49 CFR Appendix A to Part 213, Maximum Allowable Curving Speeds

Appendix A to Part 213 - Maximum Allowable Curving Speeds

This appendix contains four tables identifying maximum allowing curving speeds based on 3, 4, 5, and 6 inches of unbalance (cant deficiency), respectively.

Table 1 - Three Inches Unbalance

Elevation of outer rail (inches)
0 1/2 1 1 1/2 2 2 1/2 3 3 1/2 4 4 1/2 5 5 1/2 6
Degree of curvature Maximum allowable operating speed (m.p.h.)
0°30′ 93 100 107 113 120 125 131 136 141 146 151 156 160
0°40′ 80 87 93 98 104 109 113 118 122 127 131 135 139
0°50′ 72 77 83 88 93 97 101 106 110 113 117 121 124
1°00′ 65 71 76 80 85 89 93 96 100 104 107 110 113
1°15′ 59 63 68 72 76 79 83 86 89 93 96 99 101
1°30′ 53 58 62 65 69 72 76 79 82 85 87 90 93
1°45′ 49 53 57 61 64 67 70 73 76 78 81 83 86
2°00′ 46 50 53 57 60 63 65 68 71 73 76 78 80
2°15′ 44 47 50 53 56 59 62 64 67 69 71 73 76
2°30′ 41 45 48 51 53 56 59 61 63 65 68 70 72
2°45′ 39 43 46 48 51 53 56 58 60 62 64 66 68
3°00′ 38 41 44 46 49 51 53 56 58 60 62 64 65
3°15′ 36 39 42 44 47 49 51 53 55 57 59 61 63
3°30′ 35 38 40 43 45 47 49 52 53 55 57 59 61
3°45′ 34 37 39 41 44 46 48 50 52 53 55 57 59
4°00′ 33 35 38 40 42 44 46 48 50 52 53 55 57
4°30′ 31 33 36 38 40 42 44 45 47 49 50 52 53
5°00′ 29 32 34 36 38 40 41 43 45 46 48 49 51
5°30′ 28 30 32 34 36 38 39 41 43 44 46 47 48
6°00′ 27 29 31 33 35 36 38 39 41 42 44 45 46
6°30′ 26 28 30 31 33 35 36 38 39 41 42 43 44
7°00′ 25 27 29 30 32 34 35 36 38 39 40 42 43
8°00′ 23 25 27 28 30 31 33 34 35 37 38 39 40
9°00′ 22 24 25 27 28 30 31 32 33 35 36 37 38
10°00′ 21 22 24 25 27 28 29 30 32 33 34 35 36
11°00′ 20 21 23 24 25 27 28 29 30 31 32 33 34
12°00′ 19 20 22 23 24 26 27 28 29 30 31 32 33

Table 2 - Four Inches Unbalance

Elevation of outer rail (inches)
0 1/2 1 1 1/2 2 2 1/2 3 3 1/2 4 4 1/2 5 5 1/2 6
Degree of curvature Maximum allowable operating speed (m.p.h.)
0°30′ 107 113 120 125 131 136 141 146 151 156 160 165 169
0°40′ 93 98 104 109 113 118 122 127 131 135 139 143 146
0°50′ 83 88 93 97 101 106 110 113 117 121 124 128 131
1°00′ 76 80 85 89 93 96 100 104 107 110 113 116 120
1°15′ 68 72 76 79 83 86 89 93 96 99 101 104 107
1°30′ 62 65 69 72 76 79 82 85 87 90 93 95 98
1°45′ 57 61 64 67 70 73 76 78 81 83 86 88 90
2°00′ 53 57 60 63 65 68 71 73 76 78 80 82 85
2°15′ 50 53 56 59 62 64 67 69 71 73 76 78 80
2°30′ 48 51 53 56 59 61 63 65 68 70 72 74 76
2°45′ 46 48 51 53 56 58 60 62 64 66 68 70 72
3°00′ 44 46 49 51 53 56 58 60 62 64 65 67 69
3°15′ 42 44 47 49 51 53 55 57 59 61 63 65 66
3°30′ 40 43 45 47 49 52 53 55 57 59 61 62 64
3°45′ 39 41 44 46 48 50 52 53 55 57 59 60 62
4°00′ 38 40 42 44 46 48 50 52 53 55 57 58 60
4°30′ 36 38 40 42 44 45 47 49 50 52 53 55 56
5°00′ 34 36 38 40 41 43 45 46 48 49 51 52 53
5°30′ 32 34 36 38 39 41 43 44 46 47 48 50 51
6°00′ 31 33 35 36 38 39 41 42 44 45 46 48 49
6°30′ 30 31 33 35 36 38 39 41 42 43 44 46 47
7°00′ 29 30 32 34 35 36 38 39 40 42 43 44 45
8°00′ 27 28 30 31 33 34 35 37 38 39 40 41 42
9°00′ 25 27 28 30 31 32 33 35 36 37 38 39 40
10°00′ 24 25 27 28 29 30 32 33 34 35 36 37 38
11°00′ 23 24 25 27 28 29 30 31 32 33 34 35 36
12°00′ 22 23 24 26 27 28 29 30 31 32 33 34 35

Table 3 - Five Inches Unbalance

Elevation of outer rail (inches)
0 1/2 1 1 1/2 2 2 1/2 3 3 1/2 4 4 1/2 5 5 1/2 6
Degree of curvature Maximum allowable operating speed (m.p.h.)
0°30′ 120 125 131 136 141 146 151 156 160 165 169 173 177
0°40′ 104 109 113 118 122 127 131 135 139 143 146 150 150
0°50′ 93 97 101 106 110 113 117 121 124 128 131 134 137
1°00′ 85 89 93 96 100 104 107 110 113 116 120 122 125
1°15′ 76 79 83 86 89 93 96 99 101 104 107 110 112
1°30′ 69 72 76 79 82 85 87 90 93 95 98 100 102
1°45′ 64 67 70 73 76 78 81 83 86 88 90 93 95
2°00′ 60 63 65 68 71 73 76 78 80 82 85 87 89
2°15′ 56 59 62 64 67 69 71 73 76 78 80 82 84
2°30′ 53 56 59 61 63 65 68 70 72 74 76 77 79
2°45′ 51 53 56 58 60 62 64 66 68 70 72 74 76
3°00′ 49 51 53 56 58 60 62 64 65 67 69 71 72
3°15′ 47 49 51 53 55 57 59 61 63 65 66 68 70
3°30′ 45 47 49 52 53 55 57 59 61 62 64 65 67
3°45′ 44 46 48 50 52 53 55 57 59 60 62 63 65
4°00′ 42 44 46 48 50 52 53 55 57 58 60 61 63
4°30′ 40 42 44 45 47 49 50 52 53 55 56 58 59
5°00′ 38 40 41 43 45 46 48 49 51 52 53 55 56
5°30′ 36 38 39 41 43 44 46 47 48 50 51 52 53
6°00′ 35 36 38 39 41 42 44 45 46 48 49 50 51
6°30′ 33 35 36 38 39 41 42 43 44 46 47 48 49
7°00′ 32 34 35 36 38 39 40 42 43 44 45 46 47
8°00′ 30 31 33 34 35 37 38 39 40 41 42 43 44
9°00′ 28 30 31 32 33 35 36 37 38 39 40 41 42
10°00′ 27 28 29 30 32 33 34 35 36 37 38 39 40
11°00′ 25 27 28 29 30 31 32 33 34 35 36 37 38
12°00′ 24 26 27 28 29 30 31 32 33 34 35 35 36

Table 4 - Six Inches Unbalance

Elevation of outer rail (inches)
0 1/2 1 1 1/2 2 2 1/2 3 3 1/2 4 4 1/2 5 5 1/2 6
Degree of curvature Maximum allowable operating speed (m.p.h.)
0°30′ 131 136 141 146 151 156 160 165 169 173 177 181 185
0°40′ 113 118 122 127 131 135 139 143 146 150 154 157 160
0°50′ 101 106 110 113 117 121 124 128 131 134 137 140 143
1°00′ 93 96 100 104 107 110 113 116 120 122 125 128 131
1°15′ 83 86 89 93 96 99 101 104 107 110 112 115 117
1°30′ 76 79 82 85 87 90 93 95 98 100 102 105 107
1°45′ 70 73 76 78 81 83 86 88 90 93 95 97 99
2°00′ 65 68 71 73 76 78 80 82 85 87 89 91 93
2°15′ 62 64 67 69 71 73 76 78 80 82 84 85 87
2°30′ 59 61 63 65 68 70 72 74 76 77 79 81 83
2°45′ 56 58 60 62 64 66 68 70 72 74 76 77 79
3°00′ 53 56 58 60 62 64 65 67 69 71 72 74 76
3°15′ 51 53 55 57 59 61 63 65 66 68 70 71 73
3°30′ 49 52 53 55 57 59 61 62 64 65 67 69 70
3°45′ 48 50 52 53 55 57 59 60 62 63 65 66 68
4°00′ 46 48 50 52 53 55 57 58 60 61 63 64 65
4°30′ 44 45 47 49 50 52 53 55 56 58 59 60 62
5°00′ 41 43 45 46 48 49 51 52 53 55 56 57 59
5°30′ 39 41 43 44 46 47 48 50 51 52 53 55 56
6°00′ 38 39 41 42 44 45 46 48 49 50 51 52 53
6°30′ 36 38 39 41 42 43 44 46 47 48 49 50 51
7°00′ 35 36 38 39 40 42 43 44 45 46 47 48 49
8°00′ 33 34 35 37 38 39 40 41 42 43 44 45 46
9°00′ 31 32 33 35 36 37 38 39 40 41 42 43 44
10°00′ 29 30 32 33 34 35 36 37 38 39 40 41 41
11°00′ 28 29 30 31 32 33 34 35 36 37 38 39 39
12°00′ 27 28 29 30 31 32 33 34 35 35 36 37 38
[ 78 FR 16113, Mar. 13, 2013]

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