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LEGEND
* OR AS SHOWN ELSEWHERE OF THE PLANS.
13I FLASHING ARROW PANEL <TYPE "CO)
GENERAL NOTES:
3. ALL CHANNELIZING DEVICES SHALL BE REFLECTORIZED FREE-STANDING
PLASTIC DRUMS.
1. THE LOCATION OF CHANNELIZING DEVICES AND THE WORK AREA
LAYOUT SHALL BE BASED ON THE CRITERIA IN THE FOLLOWING
TABLE:
MAXIMUM
CHANNELIZING
POSTED SPEED
MINIMUM
DEVICE SPACING
AND/OR
(m)
LONGITUDINAL
DESIGN SPEED
BUFFER
SPACE
ALONG
(m)
TAPER LANE LINE 8<
WORK ZONE
mph
km/h
11
22
45
60
~40
13
26
45
70
65
15
30
85
80
50
17
34
90
105
55
19
100
60 8< 65
38
135
42
21
70
110
170
t
4. ALL TRAFFIC CONTROL ITEMS SHOWN ON THIS SHEET WILL NOT
BE MEASURED FOR SEPARATE PAYMENT. THIS WORK IS TO BE INCLUDED
IN THE PRICE BID FOR MAINTENANCE OF TRAFFIC.
TAPER t
RATES
24:1
42:1
48:1
54:1
60:1
66:1
NOTE: TAPER RATES ARE DETERMINED USING THE FOLLOWING EQUATIONS:
L = 0.6WS FOR SPEEDS OF 70 km/h OR GREATER
L = WS2/155 FOR SPEEDS OF 60 km/h OR LESS
WHERE: L = MINIMUM LENGTH OF TAPER IN METERS
W = WIDTH OF OFFSET (USUALLY LANE WIDTH) IN METERS
S = DESIGN SPEED OR 85TH PERCENTILE SPEED IN
KILOMETERS PER HOUR
2. FLASHING ARROW PANEL SHALL BE AS LEVEL AS POSSIBLE
AS APPROVED BY THE ENGINEER. FLASHING ARROW PANEL
SHOULD BE LOCATED AT THE BEGINNING OF THE TAPER OR,
IF THE SHOULDER IS TOO NARROW,BEHIND THE CHANNELIZING
DEVICES IN THE CLOSED LANE.
lsl BLACK
LEGEND AND BORDER ON WHITE BACKGROUND
~ TYPE "B" WARNING LIGHTS
• REFLECTORIZED FREE-STANDING PLASTIC DRUMS
5. DIAMOND SHAPED TRAFFIC CONTROL SIGNS SHALL BE A MINIMUM OF
1200 X 1200.
6. ALL EXISTING SPEED LIMIT SIGNS WHICH ARE INFLUENCED BY OR
CONFLICT WITH THE SPEED ZONE REDUCTION SHALL BE COVERED
AS DIRECTED BY THE ENGINEER WHILE THE REDUCED SPEED
LIMIT IS IN EFFECT. TAPE SHALL NOT BE USED ON FACE OF SIGN.
7. ADDITIONAL REDUCED SPEED LIMIT SIGNS ARE REQUIRED AT EACH ENTRANCE
RAMP WITHIN THE SPEED ZONE. A MINIMUM OF TWO (2) WILL BE REQUIRED
FOR EACH RAMP. LOCATION AND NUMBER REQUIRED WILL BE DETERMINED
BY THE ENGINEER.
8. THIS TRAFFIC CONTROL PLAN. WITH SPEED ZONE,MAY NOT BE USED
ON ANY FACILITY WHERE THE POSTED SPEED LIMIT IS BELOW 65 MPH
WITHOUT A COMMISSION ORDER REQUESTING A SPEED LIMIT REDUCTION.
ALL DIMENSIONS ARE IN MILLIMETERS (mm) EXCEPT WHERE NOTED.
>-
CD
9. LAYOUT SHOWN ABOVE IS FOR AN INTERSTATE WITH A POSTED SPEED
LIMIT OF 70 MPH. FOR POSTED SPEED LIMIT OF 65 MPH, THE REDUCED
SPEED LIMIT WILL BE 55 MPH.
MISSISSIPPI DEPARTMENT OF TRANSPORTATION
ROADWAY DESIGN DIVISION
STANDARD PLAN
TRAFFIC CONTROL PLAN
FOR POSTED SPEED LIMIT
10. A FLUORESCENT ORANGE PLATE IS REQUIRED WITH ALL REGULATORY SPEED
LIMIT SIGNS AND "REDUCED SPEED AHEAD" SIGNS REQUIRED FOR LANE CLOSURE.
OF 65 OR 70 MPH
(INTERSTATES AND OTHER 4-LANE
DNIDED HIGHWAYS)
(MEDIAN LANE OR OUTSIDE
LANE CLOSURE) (EXTENDED PERIOD)
w
~ ISSUE DATE:
OCTOBER I, 1998
WORKING NUMBER
TCP-4
SHEET NUMBER
253