Page 113 - Highway Engineering Handbook Building and Rehabilitating the Infrastructure

96 CHAPTER TWO

TABLE 2.10 Minimum Radii for Design Speeds from 15 to 80 mi/h (24 to 129 km/h) and
Superelevation Rates to 10 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)
1.5 8280 9890 11700 13100 14700 16300 18000
2.0 6130 7330 8630 9720 10900 12200 13500
2.2 5540 6630 7810 8800 9860 11000 12200
2.4 5050 6050 7130 8040 9010 10100 11200
2.6 4640 5550 6550 7390 8290 9260 10300
2.8 4280 5130 6050 6840 7680 8580 9550
3.0 3970 4760 5620 6360 7140 7990 8900
3.2 3700 4440 5250 5930 6680 7480 8330
3.4 3470 4160 4910 5560 6260 7020 7830
3.6 3250 3900 4620 5230 5900 6620 7390
3.8 3060 3680 4350 4940 5570 6260 6990
4.0 2890 3470 4110 4670 5270 5930 6630
4.2 2740 3290 3900 4430 5010 5630 6300
4.4 2590 3120 3700 4210 4760 5370 6010
4.6 2460 2970 3520 4010 4540 5120 5740
4.8 2340 2830 3360 3830 4340 4900 5490
5.0 2240 2700 3200 3660 4150 4690 5270
5.2 2130 2580 3060 3500 3980 4500 5060
5.4 2040 2460 2930 3360 3820 4320 4860
5.6 1950 2360 2810 3220 3670 4160 4680
5.8 1870 2260 2700 3090 3530 4000 4510
6.0 1790 2170 2590 2980 3400 3860 4360
6.2 1720 2090 2490 2870 3280 3730 4210
6.4 1650 2010 2400 2760 3160 3600 4070
6.6 1590 1930 2310 2670 3060 3480 3940
6.8 1530 1860 2230 2570 2960 3370 3820
7.0 1470 1790 2150 2490 2860 3270 3710
7.2 1410 1730 2070 2410 2770 3170 3600
7.4 1360 1670 2000 2330 2680 3070 3500
7.6 1310 1610 1940 2250 2600 2990 3400
7.8 1260 1550 1870 2180 2530 2900 3310
8.0 1220 1500 1810 2120 2450 2820 3220
8.2 1170 1440 1750 2050 2380 2750 3140
8.4 1130 1390 1690 1990 2320 2670 3060
8.6 1080 1340 1630 1930 2250 2600 2980
8.8 1040 1290 1570 1870 2190 2540 2910
9.0 992 1240 1520 1810 2130 2470 2840
9.2 948 1190 1460 1740 2060 2410 2770
9.4 903 1130 1390 1670 1990 2340 2710
9.6 854 1080 1320 1600 1910 2260 2640
9.8 798 1010 1250 1510 1820 2160 2550
10.0 694 877 1090 1340 1630 1970 2370
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.