Table 3-4 Clear Zone Requirements FILL SLOPES CUT SLOPES DESIGN (H:V) (H:V) ADT 6 : 1 or 5 : 1 to 3 : 1 3 : 1 4 : 1 to 6 : 1 or Posted flatter 4 : 1 5 : 1 flatter SPEED 40 mph Under 750 7-10 7-10 ** 7-10 7-10 7-10 Or 750-1500 10-12 12-14 ** 10-12 10-12 10-12 Less 1500-6000 12-14 14-16 ** 12-14 12-14 12-14 Over 6000 14-16 16-18 ** 14-16 14-16 14-16 Under 750 10-12 12-14 ** 8-10 8-10 10-12 45-50 750-1500 14-16 16-20 ** 10-12 12-14 14-16 MPH 1500-6000 16-18 20-26 ** 12-14 14-16 16-18 Over 6000 20-22 24-28 ** 14-16 18-20 20-22
Table 3-4 Clear Zone Requirements Posted SPEED DESIGN ADT FILL SLOPES (H:V) CUT SLOPES (H:V) 6 : 1 or flatter 5 : 1 to 4 : 1 3 : 1 3 : 1 4 : 1 to 5 : 1 6 : 1 or flatter 40 mph Or Less Under 750 7-10 7-10 ** 7-10 7-10 7-10 750-1500 10-12 12-14 ** 10-12 10-12 10-12 1500-6000 12-14 14-16 ** 12-14 12-14 12-14 Over 6000 14-16 16-18 ** 14-16 14-16 14-16 45-50 MPH Under 750 10-12 12-14 ** 8-10 8-10 10-12 750-1500 14-16 16-20 ** 10-12 12-14 14-16 1500-6000 16-18 20-26 ** 12-14 14-16 16-18 Over 6000 20-22 24-28 ** 14-16 18-20 20-22
Road%20Standards%20clean%20draft%20dated%203-22-2017.docx