49 C.F.R. § A to Part 213

Current through September 30, 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)
01/2 1 11/2 2 21/2 3 31/2 4 41/2 5 51/2 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°30'93100107113120125131136141146151156160
0°40'80879398104109113118122127131135139
0°50'727783889397101106110113117121124
1°00'6571768085899396100104107110113
1°15'596368727679838689939699101
1°30'53586265697276798285879093
1°45'49535761646770737678818386
2°00'46505357606365687173767880
2°15'44475053565962646769717376
2°30'41454851535659616365687072
2°45'39434648515356586062646668
3°00'38414446495153565860626465
3°15'36394244474951535557596163
3°30'35384043454749525355575961
3°45'34373941444648505253555759
4°00'33353840424446485052535557
4°30'31333638404244454749505253
5°00'29323436384041434546484951
5°30'28303234363839414344464748
6°00'27293133353638394142444546
6°30'26283031333536383941424344
7°00'25272930323435363839404243
8°00'23252728303133343537383940
9°00'22242527283031323335363738
10°00'21222425272829303233343536
11°00'20212324252728293031323334
12°00'19202223242627282930313233

Table 2-Four Inches Unbalance

Elevation of outer rail (inches)
01/2 1 11/2 2 21/2 3 31/2 4 41/2 5 51/2 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°30'107113120125131136141146151156160165169
0°40'9398104109113118122127131135139143146
0°50'83889397101106110113117121124128131
1°00'768085899396100104107110113116120
1°15'68727679838689939699101104107
1°30'62656972767982858790939598
1°45'57616467707376788183868890
2°00'53576063656871737678808285
2°15'50535659626467697173767880
2°30'48515356596163656870727476
2°45'46485153565860626466687072
3°00'44464951535658606264656769
3°15'42444749515355575961636566
3°30'40434547495253555759616264
3°45'39414446485052535557596062
4°00'38404244464850525355575860
4°30'36384042444547495052535556
5°00'34363840414345464849515253
5°30'32343638394143444647485051
6°00'31333536383941424445464849
6°30'30313335363839414243444647
7°00'29303234353638394042434445
8°00'27283031333435373839404142
9°00'25272830313233353637383940
10°00'24252728293032333435363738
11°00'23242527282930313233343536
12°00'22232426272829303132333435

Table 3-Five Inches Unbalance

Elevation of outer rail (inches)
01/2 1 11/2 2 21/2 3 31/2 4 41/2 5 51/2 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°30'120125131136141146151156160165169173177
0°40'104109113118122127131135139143146150150
0°50'9397101106110113117121124128131134137
1°00'85899396100104107110113116120122125
1°15'7679838689939699101104107110112
1°30'6972767982858790939598100102
1°45'64677073767881838688909395
2°00'60636568717376788082858789
2°15'56596264676971737678808284
2°30'53565961636568707274767779
2°45'51535658606264666870727476
3°00'49515356586062646567697172
3°15'47495153555759616365666870
3°30'45474952535557596162646567
3°45'44464850525355575960626365
4°00'42444648505253555758606163
4°30'40424445474950525355565859
5°00'38404143454648495152535556
5°30'36383941434446474850515253
6°00'35363839414244454648495051
6°30'33353638394142434446474849
7°00'32343536383940424344454647
8°00'30313334353738394041424344
9°00'28303132333536373839404142
10°00'27282930323334353637383940
11°00'25272829303132333435363738
12°00'24262728293031323334353536

Table 4-Six Inches Unbalance

Elevation of outer rail (inches)
01/2 1 11/2 2 21/2 3 31/2 4 41/2 5 51/2 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°30'131136141146151156160165169173177181185
0°40'113118122127131135139143146150154157160
0°50'101106110113117121124128131134137140143
1°00'9396100104107110113116120122125128131
1°15'838689939699101104107110112115117
1°30'767982858790939598100102105107
1°45'70737678818386889093959799
2°00'65687173767880828587899193
2°15'62646769717376788082848587
2°30'59616365687072747677798183
2°45'56586062646668707274767779
3°00'53565860626465676971727476
3°15'51535557596163656668707173
3°30'49525355575961626465676970
3°45'48505253555759606263656668
4°00'46485052535557586061636465
4°30'44454749505253555658596062
5°00'41434546484951525355565759
5°30'39414344464748505152535556
6°00'38394142444546484950515253
6°30'36383941424344464748495051
7°00'35363839404243444546474849
8°00'33343537383940414243444546
9°00'31323335363738394041424344
10°00'29303233343536373839404141
11°00'28293031323334353637383939
12°00'27282930313233343535363738

49 C.F.R. §A to Part 213

78 FR 16113, Mar. 13, 2013