Appendix A - 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 |
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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 |
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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 |
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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 |
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