SECTION 13.5 VARIANCES
The foregoing subsections of Article XIII shall be subject to the same provisions regarding variances there from as provided by all the provisions regarding Sections 18.6 and 18.7 of this Ordinance.
 
TABLE 13
SIGHT DISTANCE FOR VEHICLES EXITING FROM ACCESS POINTS ONTO ADJACENT ROADS
D = DISTANCE ALONG MAJOR ROAD FROM ACCESS POINT TO ALLOW VEHICLE TO ENTER SAFELY
(DISTANCES IN FEET)
20 MPH
30 MPH
40 MPH
50 MPH
60 MPH
VEH TYPE
2 Lane
4 or 6 Lane
2 Lane
4 or 6 Lane
2 Lane
4 or 6 Lane
2 Lane
4 or 6 Lane
2 Lane
4 or 6 Lane
DL
DR
DL
DR
DL
DR
DL
DR
DL
DR
DL
DR
DL
DR
DL
DR
DL
DR
DL
DR
Pass Car
150
130
130
130
360
320
220
260
530
440
380
440
740
700
620
700
950
1,050
950
1,050
Truck
300
200
200
200
500
400
400
400
850
850
850
508
1,600
1,600
1,600
1,600
2,500
2,500
2,500
2,500
 
 
TABLE 14
LEFT TURN DISTANCE FOR VEHICLES ENTERING ACCESS POINTS
S = SIGHT DISTANCE ALONG MAJOR ROUTE FOR VEHICLE TO SAFELY TURN LEFT INTO ACCESS POINT
(DISTANCES IN FEET)
20 MPH
30 MPH
40 MPH
50 MPH
60 MPH
VEH TYPE
2 Lane
4 Lane
6 Lane
2 Lane
4 Lane
6 Lane
2 Lane
4 Lane
6 Lane
2 Lane
4 Lane
6 Lane
2 Lane
4 Lane
6 Lane
Pass Car
150
160
170
230
250
270
370
390
420
520
550
580
700
740
780
Truck
260
260
300
400
440
480
570
620
670
810
880
950
1,000
1,100
1,200
 
Values are for urban conditions. On rural streets, distances are to be increased by 10 Percent to allow for longer drive reaction time.  The sight distances apply when street grades are zero to 3.0 percent (either up or down). When an upgrade is steeper than 3.0 percent, adjustments are to made to compensate for the longer time required to reach the speed of highway traffic. The time is less than shown when the highway is descending. Adjustment factors below apply to grades only in that portion of the road between the access points and the downstream point at which a vehicle emerging from the access points has been able to accelerate to within ten miles per hour of the route speed.  When the street, in the section to be used for acceleration after leaving the access point, ascends at 3 to 4 percent, then sight distances in the direction of approaching ascending traffic are to be increased by a factor of 4.1. When the access point ascends at 5 to 6 percent, sight distance should be increased by a factor of 1.7.  When the road in the section to be used for acceleration after leaving the access point descends at 3 to 4 percent, sight distance in the direction of approaching descending highway traffic should be reduced by a factor of 0.6. If the road descends at 5 to 6 percent, sight distance should be reduced by a factor of 0.5.  When the criteria for sight distances to the right cannot be met, the need can be eliminated by prohibiting left turns by exiting vehicles.