Page 117 - Highway Engineering Handbook Building and Rehabilitating the Infrastructure

100 CHAPTER TWO

TABLE 2.11 Minimum Radii for Design Speeds from 15 to 80 mi/h (24 to 129 km/h) and
Superelevation Rates to 12 Percent (Continued)
eV 50 mi/h V 55 mi/h V 60 mi/h V 65 mi/h V 70 mi/h V 75 mi/h V 80 mi/h
d d d d d d d
(%) R (ft) R (ft) R (ft) R (ft) R (ft) R (ft) R (ft)
8.2 1320 1600 1910 2210 2530 2880 3260
8.4 1280 1550 1860 2150 2460 2800 3180
8.6 1240 1510 1810 2090 2400 2740 3100
8.8 1200 1470 1760 2040 2340 2670 3030
9.0 1170 1430 1710 1980 2280 2610 2960
9.2 1140 1390 1660 1940 2230 2550 2890
9.4 1100 1350 1620 1890 2180 2490 2830
9.6 1070 1310 1580 1840 2130 2440 2770
9.8 1040 1280 1540 1800 2080 2380 2710
10.0 1010 1250 1500 1760 2030 2330 2660
10.2 980 1210 1460 1720 1990 2280 2600
10.4 951 1180 1430 1680 1940 2240 2550
10.6 922 1140 1390 1640 1900 2190 2500
10.8 892 1110 1350 1600 1860 2150 2460
11.0 862 1070 1310 1560 1820 2110 2410
11.2 831 1040 1270 1510 1780 2070 2370
11.4 799 995 1220 1470 1730 2020 2320
11.6 763 953 1170 1410 1680 1970 2280
11.8 722 904 1120 1350 1620 1910 2230
12.0 641 807 1000 1220 1480 1790 2130
Conversions: 1 mi/h 1.609 km/h, 1 ft 0.305 m.
R radius of curve
V design speed
d
e rate of superelevation
Source: A Policy on Geometric Design of Highways and Streets, American Association of State Highway
and Transportation Officials, Washington, D.C., 2004, with permission.