Page 116 - Highway Engineering Handbook Building and Rehabilitating the Infrastructure
P. 116
HIGHWAY LOCATION, DESIGN, AND TRAFFIC 99
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)
e V 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 8370 9990 11800 13200 14800 16400 18100
2.0 6220 7430 8740 9840 11000 12300 13600
2.2 5640 6730 7930 8920 9980 11200 12400
2.4 5150 6150 7240 8160 9130 10200 11300
2.6 4730 5660 6670 7510 8420 9380 10500
2.8 4380 5240 6170 6960 7800 8700 9660
3.0 4070 4870 5740 6480 7270 8110 9010
3.2 3800 4550 5370 6060 6800 7600 8440
3.4 3560 4270 5030 5690 6390 7140 7940
3.6 3350 4020 4740 5360 6020 6740 7500
3.8 3160 3790 4470 5060 5700 6380 7100
4.0 2990 3590 4240 4800 5400 6050 6740
4.2 2840 3400 4020 4560 5130 5750 6420
4.4 2700 3240 3830 4340 4890 5490 6120
4.6 2570 3080 3650 4140 4670 5240 5850
4.8 2450 2940 3480 3960 4470 5020 5610
5.0 2340 2810 3330 3790 4280 4810 5380
5.2 2240 2700 3190 3630 4110 4620 5170
5.4 2150 2590 3060 3490 3950 4440 4980
5.6 2060 2480 2940 3360 3800 4280 4800
5.8 1980 2390 2830 3230 3660 4130 4630
6.0 1910 2300 2730 3110 3530 3990 4470
6.2 1840 2210 2630 3010 3410 3850 4330
6.4 1770 2140 2540 2900 3300 3730 4190
6.6 1710 2060 2450 2810 3190 3610 4060
6.8 1650 1990 2370 2720 3090 3500 3940
7.0 1590 1930 2290 2630 3000 3400 3820
7.2 1540 1860 2220 2550 2910 3300 3720
7.4 1490 1810 2150 2470 2820 3200 3610
7.6 1440 1750 2090 2400 2740 3120 3520
7.8 1400 1700 2020 2330 2670 3030 3430
8.0 1360 1650 1970 2270 2600 2950 3340
(Continued)
