ALTERNATING 1 LANE 2 WAY TRAFFIC FLAGGER CONTROLLED HIGHWAYS 40 MPH OR LESSFILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:21 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 1
NOT TO SCALE
X X X X 50' - 300'
AREA
WORK
XXXXBR
WORK AREA
SECTION A-A
SHOULDER
EXISTING
LANE
EXISTING
LANE
EXISTING
SHOULDER
EXISTING
6
+
D
E
V
IC
E
S
5
0
'
-
1
0
0
'
T
A
P
E
R
6
+
D
E
V
IC
E
S
5
0
'
-
1
0
0
'
T
A
P
E
R
FLAGGER
PROTECTIVE VEHICLE (SEE NOTE 2)
OPTIONAL CHANNELIZATION DEVICE
)SEE NOTE 328" REFLECTIVE TRAFFIC CONE (
TEMPORARY SIGN LOCATION
:LEGEND
SEE NOTE 3
24"
STOP
SLOW
(W/R, B/O)
W21-1201
PROTECTIVE VEHICLE ROLL AHEAD DISTANCE = R
RECOMMENDED. 40' - 80'
STRATEGICALLY POSITION WORK VEHICLE TO PROTECT WORK CREW.
SEE TC420, SHEET 2.
AND INTERSECTING ROADWAY DETAILS:
FOR DRIVEWAY, BUSINESS ACCESS,
P
V
P
V
(OTHERWISE, USE PILOT CAR OPERATION)
SEE NOTE 4
TO ALT. TRAFFIC
10' MIN LANE OPEN
24"24"
W21-1201 (W/R, B/O)
STOP SLOW
TYPICAL TRAFFIC CONTROL PLANS
TC420
1
4
W20-7A
MIN 36"
MIN 36"
OR LESS
IF 40 MPH
OPTIONAL
W20-7B
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-1
MIN 36"
MIN 36"
S
E
E
N
O
T
E
S
1
&
2
(
O
P
T
IO
N
A
L
)
W20-1
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
(HIGHWAYS, 40 MPH OR LESS)
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED
30 35 4020SPEED (MPH)
B (feet)
25
115 155 200 250 305
OPTIONAL LONGITUDINAL BUFFER SPACE = B
Buffer space may be adjusted
10 to 20
10 to 20 40
TANGENTMPHTAPER
DEVICE SPACING (feet)
MAXIMUM CHANNELIZATION
60- 40 35
30 - 20URBAN STREETS
RESIDENTAL & BUSINESS DISTRICTS
RURAL ROADS & URBAN ARTERIALS
RURAL ROADS & URBAN ARTERIALS 35-40 MPH
25-30 MPH
25 MPH OR LESS
ROADWAY CONDITIONS.
(2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT
INTERCHANGE RAMPS, AT-GRADE INTERSECTIONS AND DRIVEWAYS.
(1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE
RECOMMENDED SIGN SPACING = X (1)
20' 300' @
(OPTIONAL)40'
(OPTIONAL)
20' 260' @
8. ACTUAL CENTERLINE PAVEMENT MARKINGS MAY VARY.
7. SIGNS ARE BLACK ON ORANGE UNLESS OTHERWISE INDICATED.
6. FOR PROJECT-SPECIFIC REQUIREMENTS, SEE SPECIAL PROVISIONS.
24-INCH STOP/SLOW PADDLE SIZE9-35.1
TRAFFIC CONTROL PROCEDURES1-10.3(2)A
FLAGGERS AND NIGHTTIME ILLUMINATION1-10.3(1)A
HIGH-VISIBILITY APPAREL1-07.8(1)
5. SEE STANDARD SPECIFICATIONS FOR ADDITIONAL REQUIREMENTS:
(C) PROVIDE FREE SHUTTLE (WORK TRUCK, VAN, OR BUS MAY BE USED)
(B) COMBINE BIKES & VEHICULAR TRAFFIC. BIKES TO CLEAR PRIOR TO RELEASING ONCOMING TRAFFIC
(A) ALLOW PEDESTRIANS TO USE THE PAVED SHOULDER OR ADJACENT PATH OPPOSITE THE WORK AREA
4. PEDESTRIAN & BICYCLIST ACCOMEDIATIONS (ENGINEER TO ACCEPT ANY ALTERNATIVE STRATEGIES):
3. MAY SHIFT LATERALLY. 36" TRAFFIC CONES, 42" TALL CHANNELIZATION DEVICES, OR TRAFFIC SAFETY DRUMS OK.
ADDITIONAL PVs MAY BE ADDED AT SEPARATE WORK CREWS.BUFFER SPACE IS REDUCED OR ELIMINATED.
PROTECTIVE VEHICLE MAY ALWAYS BE USED ON ROADWAYS 40 MPH OR LESS, EVEN IF THE LONGITUDINAL 2.
BY ADJUSTING LONGITUDINAL BUFFER SPACE.
1. AVOID PLACING LANE CLOSURE TAPERS WITHIN OR IMMEDIATELY FOLLOWING HORIZONTAL & VERTICAL CURVES
:NOTES
BE
PREPARED
TO STOP
ROAD
WORK
AHEAD
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
A
A
LANE
TRAFFIC
10' MIN
FILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:21 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 2
NOT TO SCALE
OPPOSITE OF LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
AREA
WORK
AREA
WORK
AREA
WORK
A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
X
AREA
WORK
I
N
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
10' SPACING ACROSS INTERSECTION
SAME SIDE AS LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
USE SIGN SEQUENCE A A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
SPACING
5'
X
AREA
WORK
IN
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
6+ DEVICES
50' TAPER
SPACING
5'
AREA
WORK
USE SIGN SEQUENCE A
X
AREA
WORK
IN
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
AREA
WORK
USE SIGN SEQUENCE A
SPACING
5' DEVICE
NOTE 10
SEE
SEE NOTE 10
SIGN SEQUENCE A
48"x48" signs required on 45+ mph roadways
NOTE 10
SEE
OPPOSITE OF LANE CLOSURE
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
SAME SIDE AS LANE CLOSURE (TWO OPEN LANES)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
SAME SIDE AS LANE CLOSURE (SINGLE OPEN LANE)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL30' = R30' = R30' = R30' = RSEE NOTE 11
(OPTIONAL)
SEE NOTE 11
(OPTIONAL)10' = R10' = R10' MIN
X X X X
24"
STOP
SLOW
(W/R, B/O)
W21-1201
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-1
MIN 36"
MIN 36"
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
D/W OR B. ACCESS
10' SPACING ACROSS
TYPICAL TRAFFIC CONTROL PLANS
TC420
2
4
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED (HIGHWAYS, 40 MPH OR LESS)
INTERSECTING ROADWAY APPROACH TO HELP GUIDE ALTERNATING & TURNING TRAFFIC.
11. SINGLE FLAGGER (WITH RED FLAG/ RED GLOW CONE FLASHLIGHT) MAY BE ADDED TO THE
ACCESS MAY BE REMOVED OR RELOCATED AS NEEDED.
RESTRICTING TURNS FROM MAINLINE. CHANNELIZATION DEVICES DELINEATING APPROACH OR
(ENGINEER MAY ACCEPT HOLDS UP TO 10 MINUTES) WHILE FOR 5 MINUTES OR LESS
MAY HOLD APPROACH OR ACCESS TRAFFIC APPROACHES, BUSINESS ACCESSES, OR DRIVEWAYS.
10. WORK MAY BRIEFLY OCCUR WITHIN LANE CLOSURE ACROSS INTERSECTING ROADWAY
9. FOR LEGEND, TABLES, AND ADDITIONAL NOTES: SEE TC420, SHEET 1.
:NOTES
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
FILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:22 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 3
TYPICAL TRAFFIC CONTROL PLANS
TC420
3
4
NOT TO SCALE
X X X X
AREA
WORK
XXXX
WORK AREA
SECTION A-A
SHOULDER
EXISTING
LANE
EXISTING
LANE
EXISTING
SHOULDER
EXISTING
SEE NOTE 3
SEE TC420, SHEET 4.
AND INTERSECTING ROADWAY DETAILS:
FOR DRIVEWAY, BUSINESS ACCESS,
SEE NOTE 4
TO ALT. TRAFFIC
10' MIN LANE OPEN
24"24"
W21-1201 (W/R, B/O)
STOP SLOW
6
+
D
E
V
IC
E
S
5
0
'
T
A
P
E
R
6
+
D
E
V
IC
E
S
5
0
'
T
A
P
E
R
80'
2
'
+
2
'
+
2.0 SEC 2.0 SEC
1 2
TRAFFIC
STOPPED
WATCH 4
mPCMS
AHEAD
1 MILE
FLAGGER
PER STD. SPEC. 1-10.3(3)C.
EXPECTED TRAFFIC QUEUE
TO FLAGGER OR PRIOR TO
24"
STOP
SLOW
SEE NOTE 2
(W/R, B/O)
W21-1201
SEE NOTE 2
(MINIMIZE DISTANCE BETWEEN MAINLINE FLAGGERS TO MINIMIZE DELAYS & TRAFFIC QUEUES)
500' MAX OR 0.1 MILE (SEE NOTE 1)
(HIGH VOLUME HIGHWAYS, 40 MPH OR LESS)
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED
P
V
40' = R
P
V
(PCMS OK, SEE NOTE 8)
mini PORTABLE CHANGEABLE MESSAGE SIGN
FLAGGER
PROTECTIVE VEHICLE
OPTIONAL CHANNELIZATION DEVICE
)SEE NOTE 328" REFLECTIVE TRAFFIC CONE (
TEMPORARY SIGN LOCATION
:LEGEND
W20-1
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
W20-1
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
OR LESS
IF 40 MPH
OPTIONAL
10
10 40
TANGENTMPHTAPER
DEVICE SPACING (feet)
MAXIMUM CHANNELIZATION
60- 40 35
30 - 20URBAN STREETS
RESIDENTAL & BUSINESS DISTRICTS
RURAL ROADS & URBAN ARTERIALS
RURAL ROADS & URBAN ARTERIALS 35-40 MPH
25-30 MPH
25 MPH OR LESS
ROADWAY CONDITIONS.
(2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT
INTERCHANGE RAMPS, AT-GRADE INTERSECTIONS AND DRIVEWAYS.
(1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE
RECOMMENDED SIGN SPACING = X (1)
20' 300' @
(OPTIONAL)80'
(OPTIONAL)
20' 220' @
9. EXISTING PAVEMENT MARKINGS MAY VARY.
8. FULL-SIZE PCMS (11' x 6' DISPLAY) MAY BE USED IN LIEU OF mPCMSs. PCMS MESSAGES MAY BE MODIFIED.
7. SIGNS ARE BLACK ON ORANGE UNLESS OTHERWISE INDICATED.
6. FOR PROJECT-SPECIFIC REQUIREMENTS, SEE SPECIAL PROVISIONS.
24-INCH STOP/SLOW PADDLE SIZE9-35.1
TRAFFIC CONTROL PROCEDURES1-10.3(2)A
FLAGGERS AND NIGHTTIME ILLUMINATION1-10.3(1)A
HIGH-VISIBILITY APPAREL1-07.8(1)
5. SEE STANDARD SPECIFICATIONS FOR ADDITIONAL REQUIREMENTS:
(C) PROVIDE FREE SHUTTLE (WORK TRUCK, VAN, OR BUS MAY BE USED)
(B) COMBINE BIKES & VEHICULAR TRAFFIC. BIKES TO CLEAR PRIOR TO RELEASING ONCOMING TRAFFIC
(A) ALLOW PEDESTRIANS TO USE THE PAVED SHOULDER OR ADJACENT PATH OPPOSITE THE WORK AREA
4. PEDESTRIAN & BICYCLIST ACCOMEDIATIONS (ENGINEER TO ACCEPT ANY ALTERNATIVE STRATEGIES):
3. MAY SHIFT LATERALLY. 36" TRAFFIC CONES, 42" TALL CHANNELIZATION DEVICES, OR TRAFFIC SAFETY DRUMS OK.
(C) EFFECTIVELY USE 2-WAY RADIOS TO MINIMIZE LOST TIME WHEN CHANGING TRAFFIC RELEASE DIRECTIONS
(B) DON'T WAIT FOR APPROACHING TRAFFIC AFTER QUEUE RELEASED. LET THEM WAIT FOR THE NEXT TURN
(A) WAVE SLOWER DRIVERS THRU TO "CLOSE THE GAP"
2. FLAGGERS' GOAL IS TO MAXIMIZE TRAFFIC CAPACITY BY MINIMIZING TRAFFIC GAPS & LOST TIME. STRATEGIES:
800+ VEHICLES/HOUR IN ALL DIRECTIONS. WORK AREA LENGTH ADJUSTS ACCORDINGLY.
TRANSPORTATION OPERATIONS. THIS ENHANCED PLAN IS APPLICABLE TO HIGH VOLUME HIGHWAYS WITH
1. DISTANCE GREATER THAN 500' BETWEEN MAINLINE FLAGGERS REQUIRES ACCEPTANCE FROM REGION
:NOTESROAD
WORK
AHEAD
BE
PREPARED
TO STOP
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
m
P
C
M
S
m
P
C
M
S
mPCMS
A
A
LANE
TRAFFIC
10' MIN
FILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:22 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 4
TYPICAL TRAFFIC CONTROL PLANS
TC420
4
4
NOT TO SCALE
OPPOSITE OF LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
AREA
WORK
AREA
WORK
AREA
WORK
A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
X
AREA
WORK
I
N
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
10' SPACING ACROSS INTERSECTION
SAME SIDE AS LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
USE SIGN SEQUENCE A A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
SPACING
5'
X
AREA
WORK
IN
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
AREA
WORK
USE SIGN SEQUENCE A
SPACING
5' DEVICE
SEE NOTE 11
SIGN SEQUENCE A
48"x48" signs required on 45+ mph roadways
NOTE 11
SEE
OPPOSITE OF LANE CLOSURE
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
SAME SIDE AS LANE CLOSURE (TWO OPEN LANES)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL30' = R30' = RSEE NOTE 12
(OPTIONAL)10' = R10' = RXXXX
24"
STOP
SLOW
(W/R, B/O)
W21-1201
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-1
MIN 36"
MIN 36"
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
D/W OR B. ACCESS
10' SPACING ACROSSSEE NOTE 13
SEE NOTE 13
SEE NOTE 13
SEE NOTE 13
FOR HIGH VOLUME CONFIGURATIONS
DETAIL NOT USED
SAME SIDE AS LANE CLOSURE (SINGLE OPEN LANE)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED (HIGH VOLUME HIGHWAYS, 40 MPH OR LESS)
TRAVELING IN THE SAME DIRECTION CONCURRENTLY.
13. FLAGGERS MAY COLLABORATE TO RELEASE APPROACH/ACCESS AND MAINLINE TRAFFIC
INTERSECTING ROADWAY APPROACH TO HELP GUIDE ALTERNATING & TURNING TRAFFIC.
12. SINGLE FLAGGER (WITH RED FLAG/ RED GLOW CONE FLASHLIGHT) MAY BE ADDED TO THE
OR ACCESS MAY BE REMOVED OR RELOCATED AS NEEDED.
WHILE RESTRICTING TURNS FROM MAINLINE. CHANNELIZATION DEVICES DELINEATING APPROACH
MAY HOLD ACCESS TRAFFIC FOR LESS THAN 1 MINUTEACCESSES AND DRIVEWAYS ONLY.
11. WORK MAY BRIEFLY OCCUR WITHIN LANE CLOSURE ACROSS INTERSECTING BUSINESS
10. FOR LEGEND, TABLES, AND ADDITIONAL NOTES: SEE TC420, SHEET 3.
:NOTES
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
FILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:23 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 1
NOT TO SCALE
X X X X 50' - 300'
AREA
WORK
XXXXBR
WORK AREA
SECTION A-A
SHOULDER
EXISTING
LANE
EXISTING
LANE
EXISTING
SHOULDER
EXISTING
6
+
D
E
V
IC
E
S
5
0
'
-
1
0
0
'
T
A
P
E
R
6
+
D
E
V
IC
E
S
5
0
'
-
1
0
0
'
T
A
P
E
R
FLAGGER
PROTECTIVE VEHICLE (SEE NOTE 2)
OPTIONAL CHANNELIZATION DEVICE
)SEE NOTE 328" REFLECTIVE TRAFFIC CONE (
TEMPORARY SIGN LOCATION
:LEGEND
SEE NOTE 3
24"
STOP
SLOW
(W/R, B/O)
W21-1201
PROTECTIVE VEHICLE ROLL AHEAD DISTANCE = R
RECOMMENDED. 40' - 80'
STRATEGICALLY POSITION WORK VEHICLE TO PROTECT WORK CREW.
SEE TC420, SHEET 2.
AND INTERSECTING ROADWAY DETAILS:
FOR DRIVEWAY, BUSINESS ACCESS,
P
V
P
V
(OTHERWISE, USE PILOT CAR OPERATION)
SEE NOTE 4
TO ALT. TRAFFIC
10' MIN LANE OPEN
24"24"
W21-1201 (W/R, B/O)
STOP SLOW
TYPICAL TRAFFIC CONTROL PLANS
TC420
1
4
W20-7A
MIN 36"
MIN 36"
OR LESS
IF 40 MPH
OPTIONAL
W20-7B
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-1
MIN 36"
MIN 36"
S
E
E
N
O
T
E
S
1
&
2
(
O
P
T
IO
N
A
L
)
W20-1
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
(HIGHWAYS, 40 MPH OR LESS)
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED
30 35 4020SPEED (MPH)
B (feet)
25
115 155 200 250 305
OPTIONAL LONGITUDINAL BUFFER SPACE = B
Buffer space may be adjusted
10 to 20
10 to 20 40
TANGENTMPHTAPER
DEVICE SPACING (feet)
MAXIMUM CHANNELIZATION
60- 40 35
30 - 20URBAN STREETS
RESIDENTAL & BUSINESS DISTRICTS
RURAL ROADS & URBAN ARTERIALS
RURAL ROADS & URBAN ARTERIALS 35-40 MPH
25-30 MPH
25 MPH OR LESS
ROADWAY CONDITIONS.
(2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT
INTERCHANGE RAMPS, AT-GRADE INTERSECTIONS AND DRIVEWAYS.
(1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE
RECOMMENDED SIGN SPACING = X (1)
20' 300' @
(OPTIONAL)40'
(OPTIONAL)
20' 260' @
8. ACTUAL CENTERLINE PAVEMENT MARKINGS MAY VARY.
7. SIGNS ARE BLACK ON ORANGE UNLESS OTHERWISE INDICATED.
6. FOR PROJECT-SPECIFIC REQUIREMENTS, SEE SPECIAL PROVISIONS.
24-INCH STOP/SLOW PADDLE SIZE9-35.1
TRAFFIC CONTROL PROCEDURES1-10.3(2)A
FLAGGERS AND NIGHTTIME ILLUMINATION1-10.3(1)A
HIGH-VISIBILITY APPAREL1-07.8(1)
5. SEE STANDARD SPECIFICATIONS FOR ADDITIONAL REQUIREMENTS:
(C) PROVIDE FREE SHUTTLE (WORK TRUCK, VAN, OR BUS MAY BE USED)
(B) COMBINE BIKES & VEHICULAR TRAFFIC. BIKES TO CLEAR PRIOR TO RELEASING ONCOMING TRAFFIC
(A) ALLOW PEDESTRIANS TO USE THE PAVED SHOULDER OR ADJACENT PATH OPPOSITE THE WORK AREA
4. PEDESTRIAN & BICYCLIST ACCOMEDIATIONS (ENGINEER TO ACCEPT ANY ALTERNATIVE STRATEGIES):
3. MAY SHIFT LATERALLY. 36" TRAFFIC CONES, 42" TALL CHANNELIZATION DEVICES, OR TRAFFIC SAFETY DRUMS OK.
ADDITIONAL PVs MAY BE ADDED AT SEPARATE WORK CREWS.BUFFER SPACE IS REDUCED OR ELIMINATED.
PROTECTIVE VEHICLE MAY ALWAYS BE USED ON ROADWAYS 40 MPH OR LESS, EVEN IF THE LONGITUDINAL 2.
BY ADJUSTING LONGITUDINAL BUFFER SPACE.
1. AVOID PLACING LANE CLOSURE TAPERS WITHIN OR IMMEDIATELY FOLLOWING HORIZONTAL & VERTICAL CURVES
:NOTES
BE
PREPARED
TO STOP
ROAD
WORK
AHEAD
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
A
A
LANE
TRAFFIC
10' MIN
FILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:23 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 2
NOT TO SCALE
OPPOSITE OF LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
AREA
WORK
AREA
WORK
AREA
WORK
A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
X
AREA
WORK
I
N
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
10' SPACING ACROSS INTERSECTION
SAME SIDE AS LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
USE SIGN SEQUENCE A A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
SPACING
5'
X
AREA
WORK
IN
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
6+ DEVICES
50' TAPER
SPACING
5'
AREA
WORK
USE SIGN SEQUENCE A
X
AREA
WORK
IN
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
AREA
WORK
USE SIGN SEQUENCE A
SPACING
5' DEVICE
NOTE 10
SEE
SEE NOTE 10
SIGN SEQUENCE A
48"x48" signs required on 45+ mph roadways
NOTE 10
SEE
OPPOSITE OF LANE CLOSURE
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
SAME SIDE AS LANE CLOSURE (TWO OPEN LANES)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
SAME SIDE AS LANE CLOSURE (SINGLE OPEN LANE)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL30' = R30' = R30' = R30' = RSEE NOTE 11
(OPTIONAL)
SEE NOTE 11
(OPTIONAL)10' = R10' = R10' MIN
X X X X
24"
STOP
SLOW
(W/R, B/O)
W21-1201
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-1
MIN 36"
MIN 36"
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
D/W OR B. ACCESS
10' SPACING ACROSS
TYPICAL TRAFFIC CONTROL PLANS
TC420
2
4
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED (HIGHWAYS, 40 MPH OR LESS)
INTERSECTING ROADWAY APPROACH TO HELP GUIDE ALTERNATING & TURNING TRAFFIC.
11. SINGLE FLAGGER (WITH RED FLAG/ RED GLOW CONE FLASHLIGHT) MAY BE ADDED TO THE
ACCESS MAY BE REMOVED OR RELOCATED AS NEEDED.
RESTRICTING TURNS FROM MAINLINE. CHANNELIZATION DEVICES DELINEATING APPROACH OR
(ENGINEER MAY ACCEPT HOLDS UP TO 10 MINUTES) WHILE FOR 5 MINUTES OR LESS
MAY HOLD APPROACH OR ACCESS TRAFFIC APPROACHES, BUSINESS ACCESSES, OR DRIVEWAYS.
10. WORK MAY BRIEFLY OCCUR WITHIN LANE CLOSURE ACROSS INTERSECTING ROADWAY
9. FOR LEGEND, TABLES, AND ADDITIONAL NOTES: SEE TC420, SHEET 1.
:NOTES
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
FILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:23 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 3
TYPICAL TRAFFIC CONTROL PLANS
TC420
3
4
NOT TO SCALE
X X X X
AREA
WORK
XXXX
WORK AREA
SECTION A-A
SHOULDER
EXISTING
LANE
EXISTING
LANE
EXISTING
SHOULDER
EXISTING
SEE NOTE 3
SEE TC420, SHEET 4.
AND INTERSECTING ROADWAY DETAILS:
FOR DRIVEWAY, BUSINESS ACCESS,
SEE NOTE 4
TO ALT. TRAFFIC
10' MIN LANE OPEN
24"24"
W21-1201 (W/R, B/O)
STOP SLOW
6
+
D
E
V
IC
E
S
5
0
'
T
A
P
E
R
6
+
D
E
V
IC
E
S
5
0
'
T
A
P
E
R
80'
2
'
+
2
'
+
2.0 SEC 2.0 SEC
1 2
TRAFFIC
STOPPED
WATCH 4
mPCMS
AHEAD
1 MILE
FLAGGER
PER STD. SPEC. 1-10.3(3)C.
EXPECTED TRAFFIC QUEUE
TO FLAGGER OR PRIOR TO
24"
STOP
SLOW
SEE NOTE 2
(W/R, B/O)
W21-1201
SEE NOTE 2
(MINIMIZE DISTANCE BETWEEN MAINLINE FLAGGERS TO MINIMIZE DELAYS & TRAFFIC QUEUES)
500' MAX OR 0.1 MILE (SEE NOTE 1)
(HIGH VOLUME HIGHWAYS, 40 MPH OR LESS)
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED
P
V
40' = R
P
V
(PCMS OK, SEE NOTE 8)
mini PORTABLE CHANGEABLE MESSAGE SIGN
FLAGGER
PROTECTIVE VEHICLE
OPTIONAL CHANNELIZATION DEVICE
)SEE NOTE 328" REFLECTIVE TRAFFIC CONE (
TEMPORARY SIGN LOCATION
:LEGEND
W20-1
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
W20-1
MIN 36"
MIN 36"
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
OR LESS
IF 40 MPH
OPTIONAL
10
10 40
TANGENTMPHTAPER
DEVICE SPACING (feet)
MAXIMUM CHANNELIZATION
60- 40 35
30 - 20URBAN STREETS
RESIDENTAL & BUSINESS DISTRICTS
RURAL ROADS & URBAN ARTERIALS
RURAL ROADS & URBAN ARTERIALS 35-40 MPH
25-30 MPH
25 MPH OR LESS
ROADWAY CONDITIONS.
(2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT
INTERCHANGE RAMPS, AT-GRADE INTERSECTIONS AND DRIVEWAYS.
(1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE
RECOMMENDED SIGN SPACING = X (1)
20' 300' @
(OPTIONAL)80'
(OPTIONAL)
20' 220' @
9. EXISTING PAVEMENT MARKINGS MAY VARY.
8. FULL-SIZE PCMS (11' x 6' DISPLAY) MAY BE USED IN LIEU OF mPCMSs. PCMS MESSAGES MAY BE MODIFIED.
7. SIGNS ARE BLACK ON ORANGE UNLESS OTHERWISE INDICATED.
6. FOR PROJECT-SPECIFIC REQUIREMENTS, SEE SPECIAL PROVISIONS.
24-INCH STOP/SLOW PADDLE SIZE9-35.1
TRAFFIC CONTROL PROCEDURES1-10.3(2)A
FLAGGERS AND NIGHTTIME ILLUMINATION1-10.3(1)A
HIGH-VISIBILITY APPAREL1-07.8(1)
5. SEE STANDARD SPECIFICATIONS FOR ADDITIONAL REQUIREMENTS:
(C) PROVIDE FREE SHUTTLE (WORK TRUCK, VAN, OR BUS MAY BE USED)
(B) COMBINE BIKES & VEHICULAR TRAFFIC. BIKES TO CLEAR PRIOR TO RELEASING ONCOMING TRAFFIC
(A) ALLOW PEDESTRIANS TO USE THE PAVED SHOULDER OR ADJACENT PATH OPPOSITE THE WORK AREA
4. PEDESTRIAN & BICYCLIST ACCOMEDIATIONS (ENGINEER TO ACCEPT ANY ALTERNATIVE STRATEGIES):
3. MAY SHIFT LATERALLY. 36" TRAFFIC CONES, 42" TALL CHANNELIZATION DEVICES, OR TRAFFIC SAFETY DRUMS OK.
(C) EFFECTIVELY USE 2-WAY RADIOS TO MINIMIZE LOST TIME WHEN CHANGING TRAFFIC RELEASE DIRECTIONS
(B) DON'T WAIT FOR APPROACHING TRAFFIC AFTER QUEUE RELEASED. LET THEM WAIT FOR THE NEXT TURN
(A) WAVE SLOWER DRIVERS THRU TO "CLOSE THE GAP"
2. FLAGGERS' GOAL IS TO MAXIMIZE TRAFFIC CAPACITY BY MINIMIZING TRAFFIC GAPS & LOST TIME. STRATEGIES:
800+ VEHICLES/HOUR IN ALL DIRECTIONS. WORK AREA LENGTH ADJUSTS ACCORDINGLY.
TRANSPORTATION OPERATIONS. THIS ENHANCED PLAN IS APPLICABLE TO HIGH VOLUME HIGHWAYS WITH
1. DISTANCE GREATER THAN 500' BETWEEN MAINLINE FLAGGERS REQUIRES ACCEPTANCE FROM REGION
:NOTESROAD
WORK
AHEAD
BE
PREPARED
TO STOP
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
m
P
C
M
S
m
P
C
M
S
mPCMS
A
A
LANE
TRAFFIC
10' MIN
FILE NAME
TIME
DATE
DESIGNED BY
ENTERED BY
CHECKED BY
PROJ. ENGR.
REGIONAL ADM.REVISION DATE BY
SHEET
OF
SHEETS
Washington State
Department of Transportation
P.E. STAMP BOX P.E. STAMP BOX
DATE DATE
LOCATION NO.CONTRACT NO.
JOB NUMBER
REGION
NO.
STATE FED.AID PROJ.NO.
WASH
PLOTTED BY
PLAN REF NO
LintzF
7/18/2023
6:58:24 AM
C:\Users\LintzF\OneDrive - Washington State Department of Transportation\Desktop\Work Zone TCPs\420Hwy40-AltTrafficFlagger.dgn
10
Plot 4
TYPICAL TRAFFIC CONTROL PLANS
TC420
4
4
NOT TO SCALE
OPPOSITE OF LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
AREA
WORK
AREA
WORK
AREA
WORK
A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
X
AREA
WORK
I
N
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
10' SPACING ACROSS INTERSECTION
SAME SIDE AS LANE CLOSURE
DRIVEWAY OR BUSINESS ACCESS DETAIL
USE SIGN SEQUENCE A A
C
C
E
S
S
O
R
D
R
IV
E
W
A
Y
SPACING
5'
X
AREA
WORK
IN
T
E
R
S
E
C
T
IN
G
R
O
A
D
W
A
Y
AREA
WORK
USE SIGN SEQUENCE A
SPACING
5' DEVICE
SEE NOTE 11
SIGN SEQUENCE A
48"x48" signs required on 45+ mph roadways
NOTE 11
SEE
OPPOSITE OF LANE CLOSURE
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
SAME SIDE AS LANE CLOSURE (TWO OPEN LANES)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL30' = R30' = RSEE NOTE 12
(OPTIONAL)10' = R10' = RXXXX
24"
STOP
SLOW
(W/R, B/O)
W21-1201
W20-4
MIN 36"
MIN 36"
ROAD
AHEAD
ONE LANE
W20-1
MIN 36"
MIN 36"
40 MPH OR LESS
OPTIONAL IF
W20-7B
MIN 36"
MIN 36"
W20-7A
MIN 36"
MIN 36"
D/W OR B. ACCESS
10' SPACING ACROSSSEE NOTE 13
SEE NOTE 13
SEE NOTE 13
SEE NOTE 13
FOR HIGH VOLUME CONFIGURATIONS
DETAIL NOT USED
SAME SIDE AS LANE CLOSURE (SINGLE OPEN LANE)
UNSIGNALIZED INTERSECTING ROADWAY DETAIL
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED (HIGH VOLUME HIGHWAYS, 40 MPH OR LESS)
TRAVELING IN THE SAME DIRECTION CONCURRENTLY.
13. FLAGGERS MAY COLLABORATE TO RELEASE APPROACH/ACCESS AND MAINLINE TRAFFIC
INTERSECTING ROADWAY APPROACH TO HELP GUIDE ALTERNATING & TURNING TRAFFIC.
12. SINGLE FLAGGER (WITH RED FLAG/ RED GLOW CONE FLASHLIGHT) MAY BE ADDED TO THE
OR ACCESS MAY BE REMOVED OR RELOCATED AS NEEDED.
WHILE RESTRICTING TURNS FROM MAINLINE. CHANNELIZATION DEVICES DELINEATING APPROACH
MAY HOLD ACCESS TRAFFIC FOR LESS THAN 1 MINUTEACCESSES AND DRIVEWAYS ONLY.
11. WORK MAY BRIEFLY OCCUR WITHIN LANE CLOSURE ACROSS INTERSECTING BUSINESS
10. FOR LEGEND, TABLES, AND ADDITIONAL NOTES: SEE TC420, SHEET 3.
:NOTES
ROAD
WORK
AHEAD
BE
PREPARED
TO STOP
Plot 5
DESIGNER GUIDANCE
CONTRACT PS&Es or TCP SUBMITTALs.
DO NOT INCLUDE THIS SHEET IN
INFORMATIONAL USE ONLY
ALTERNATING 1-LANE, 2-WAY TRAFFIC: FLAGGER-CONTROLLED (HIGHWAYS, 40 MPH OR LESS)
40 mph or less
45+ mph
If not published yet, they will be added in the future.
* TC450s for traffic holds
* TC440s for temporary signal-controlled alternating traffic plans
* TC430s for AFAD-controlled alternating traffic
* TC420s for other variations of flagger-controlled alternating traffic
(https://wsdot.wa.gov/engineering-standards/all-manuals-and-standards/plan-sheet-library/work-zone-typical-traffic-control-plans-tcp)
See Typical Traffic Control Plan Library :)Other Alternating Traffic TCPs (
If not published yet, they will be added in the future.
* TC350s for traffic holds
* TC340s for temporary signal-controlled alternating traffic plans
* TC330s for AFAD-controlled alternating traffic plans
* TC320s for flagger-controlled alternating traffic plans
(https://wsdot.wa.gov/engineering-standards/all-manuals-and-standards/plan-sheet-library/work-zone-typical-traffic-control-plans-tcp)
See Typical Traffic Control Plan Library :)Other Alternating Traffic TCPs (
Details for intersecting roadways and driveway/business access for Plot 3.Plot 4:
high traffic volumes (800+ vehicles/hour in all directions) by minimizing the distance between mainline flaggers.
Flagger-controlled 1-lane, 2-way alternating traffic on the mainline for 2-lane highways 40 mph or less with a shared bicycle-vehicle lane for Plot 3:
Details for intersecting roadways and driveway/business access for Plot 1.Plot 2:
Flagger-controlled 1-lane, 2-way alternating traffic on the mainline for 2-lane highways 40 mph or less with a shared bicycle-vehicle lane.Plot 1:
:TYPICAL TCP USAGE EXPLANATION
See https://wsdot.wa.gov/engineering-standards/all-manuals-and-standards/manuals/plans-preparation-manual
Division 4 in WSDOT Plans Preparation Manual, Section 400.06(29), provides updated work zone cell library policy and information for PS&Es.
off-site consultants must manually install them. For additional information email HQCAEHelpDesk@wsdot.wa.gov.
WSDOT CAE automatically updates cell libraries on WSDOT and on-site consultant staff computers (no action needed); however, external users or
: Updated work zone cells incorporated (July 2023).WORK ZONE MICROSTATION CELLS
TC420
Do not use intermittent (old: "variable") regulatory work zone speed limit reductions for flagging or AFAD operations.
this Typical Traffic Control Plan, but may be adjusted. Contact Region Transportation Operations for additional guidance.
Q. Duration of traffic holds for driveways, business accesses, and/or roadway approaches is listed as 5 minutes (1 minute on high volume highways) in
P. The downstream taper of 50'-100' is required on 1-lane, 2-way traffic configurations.
lane(s) but is not shown in the Typical TCP.
O. Placing channelization devices transversely (at 45° and 5-foot spacing) is an optional strategy to stop move errant drivers traveling within the closed
added prior to multiple work crews within a work area. Contact Region Transportation Operations for their standard practice.
buffer is optional and may be eliminated (still okay to use PV, upgrading to transportable attenuator is not required). Additional PVs (or TAs) may be
longitudinal buffer space to provide errant vehicles an opportunity to stop before impacting the PV. On roadways 40 mph or less, the longnitudinal
N. On roadways 40 mph or less, WSDOT best practice is to place a protective vehicle (PV) in the closed lane in advance of the work area with a full
due to the low speeds of alternating traffic. Actual work area limits may be modified.
M. The lateral buffer (tranverse distance between open travel lanes and work area) is optional. No lateral buffer has been provided in these Typical TCPs
however, site-specific traffic control plans should include actual buffer distances that have been verified in the field, on SR view, or via Google Maps.
best practice when feasible, but may be adjusted based on engineering judgement. The Longitudinal Buffer Space table is acceptable in Typical TCPs;
L. Per MUTCD Section 6C.06, longitudinal buffer spaces are optional. Using longtitudinal buffer spaces listed in MUTCD Table 6C-2 is recommended as
K. Sequential arrow boards are prohibited at flagger tapers per WSDOT standard practice and per MUTCD Guidance TA-10.
J. Maximum channelization device spacing table for tangents is based on WAC 468-95-301 and may ALWAYS be reduced.
Region Transportation Operations for information regarding their standard practices.
channelization devices, or traffic safety drums may be used. Warning lights on channelization devices is being phased out in Washington. Contact
flagger-controlled alternating traffic (especially for access delineation to maintain visiblity for turning motorists). 36" reflective traffic cones, 42" tall
I. Channelization devices types may be modified (vertical panel channelization devices prohibited). 28" reflective traffic cones are recommended on
lane width per MUTCD 6C.08, Paragraph 15. Never use "L" for these tapers.
H. "Flagger tapers" are always 50'-100' per closed lane with 6 devices minimum (10'-20' spacing on the taper), regardless of the posted speed limit or
and roll ahead distances.
G. For this Typical TCP, the work zone design speed is based on the existing posted speed limit for sign spacing, channelization device spacing, buffer,
F. When positioned behind channelization devices, temporary signs should be mounted at 5' minimum.
conditions based on engineering judgement. The Sign Spacing table is acceptable to use in Typical TCPs; however, site-specific traffic control plans
E. WAC 468-95-300 modifies MUTCD Table 6-1 "Recommended Advance Warning Sign Minimum Spacing". Sign spacing may be adjusted for field
D. See MUTCD Table 6F-1 for additional temporary sign size information. Work zone signs are usually smaller than those used permanently.
Executive Order E1060 regulatory speed limit reductions & advisory speed approval policy for work zones thru Region Transportation Operations.
maintain the existing speed limit (or continuous regulatory work zone speed limit reduction, if applicable). See WSDOT Traffic Manual Section 5-18 and
Instead, C.
Typical TCPs are not "Standard Plans".
B. These typical traffic control plans may be modified for site specific situations and/or WSDOT Region Transportation Operations standard practices.
A. Contact Region Transportation Operations to determine which Typical TCP(s) to utilize, as their are several variations available (or soon will be).
:DESIGNER NOTES