Page 120 - Highway Engineering Handbook Building and Rehabilitating the Infrastructure

TABLE 2.13 Runoff Lengths (ft) for Horizontal Curves with Design Speeds from 15 to 80 mi/h (24 to
129 km/h) and Superelevation Rates to 12 Percent Based on One Lane Rotated about the Centerline
eV 15 mi/h V 20 mi/h V 25 mi/h V 30 mi/h V 35 mi/h V 40 mi/h V 45 mi/h
d d d d d d d
(%) L (ft) L (ft) L (ft) L (ft) L (ft) L (ft) L (ft)
r r r r r r r
1.5 0 0 0 0 0 0 0
2.0 31 32 34 36 39 41 44
2.2 34 36 38 40 43 46 49
2.4 37 39 41 44 46 50 53
2.6 40 42 45 47 50 54 58
2.8 43 45 48 51 54 58 62
3.0 46 49 51 55 58 62 67
3.2 49 52 55 58 62 66 71
3.4 52 55 58 62 66 70 76
3.6 55 58 62 65 70 74 80
3.8 58 62 65 69 74 79 84
4.0 62 65 69 73 77 83 89
4.2 65 68 72 76 81 87 93
4.4 68 71 75 80 85 91 98
4.6 71 75 79 84 89 95 102
4.8 74 78 82 87 93 99 107
5.0 77 81 86 91 97 103 111
5.2 80 84 89 95 101 108 116
5.4 83 88 93 98 105 112 120
5.6 86 91 96 102 108 116 124
5.8 89 94 99 105 112 120 129
6.0 92 97 103 109 116 124 133
6.2 95 101 106 113 120 128 138
6.4 98 104 110 116 124 132 142
6.6 102 107 113 120 128 137 147
6.8 105 110 117 124 132 141 151
7.0 108 114 120 127 135 145 156
7.2 111 117 123 131 139 149 160
7.4 114 120 127 135 143 153 164
7.6 117 123 130 138 147 157 169
7.8 120 126 134 142 151 161 173
8.0 123 130 137 145 155 166 178
8.2 126 133 141 149 159 170 182
8.4 129 136 144 153 163 174 187
8.6 132 139 147 156 166 178 191
8.8 135 143 151 160 170 182 196
9.0 138 146 154 164 174 186 200
9.2 142 149 158 167 178 190 204
9.4 145 152 161 171 182 194 209
9.6 148 156 165 175 186 199 213
9.8 151 159 168 178 190 203 218
10.0 154 162 171 182 194 207 222
10.2 157 165 175 185 197 211 227
10.4 160 169 178 189 201 215 231
10.6 163 172 182 193 205 219 236
10.8 166 175 185 196 209 223 240
11.0 169 178 189 200 213 228 244
11.2 172 182 192 204 217 232 249
11.4 175 185 195 207 221 236 253
11.6 178 188 199 211 225 240 258
11.8 182 191 202 215 228 244 262
12.0 185 195 206 218 232 248 267
(Continued)