49 C.F.R. § A to Part 213

Current through July 31, 2024

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	11/2	2	21/2	3	31/2	4	41/2	5	51/2	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	11/2	2	21/2	3	31/2	4	41/2	5	51/2	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	11/2	2	21/2	3	31/2	4	41/2	5	51/2	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	11/2	2	21/2	3	31/2	4	41/2	5	51/2	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

49 C.F.R. §A to Part 213

78 FR 16113, Mar. 13, 2013