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Electronic Code of Federal Regulations

e-CFR data is current as of December 5, 2019

Title 49Subtitle BChapter IIPart 213 → Appendix


Title 49: Transportation
PART 213—TRACK SAFETY STANDARDS


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 12 1112 2212 3312 4412 5512 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°3093100107113120125131136141146151156160
0°4080879398104109113118122127131135139
0°50727783889397101106110113117121124
1°006571768085899396100104107110113
1°15596368727679838689939699101
1°3053586265697276798285879093
1°4549535761646770737678818386
2°0046505357606365687173767880
2°1544475053565962646769717376
2°3041454851535659616365687072
2°4539434648515356586062646668
3°0038414446495153565860626465
3°1536394244474951535557596163
3°3035384043454749525355575961
3°4534373941444648505253555759
4°0033353840424446485052535557
4°3031333638404244454749505253
5°0029323436384041434546484951
5°3028303234363839414344464748
6°0027293133353638394142444546
6°3026283031333536383941424344
7°0025272930323435363839404243
8°0023252728303133343537383940
9°0022242527283031323335363738
10°0021222425272829303233343536
11°0020212324252728293031323334
12°0019202223242627282930313233

Table 2—Four Inches Unbalance

   Elevation of outer rail (inches)
0 12 1112 2212 3312 4412 5512 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°30107113120125131136141146151156160165169
0°409398104109113118122127131135139143146
0°5083889397101106110113117121124128131
1°00768085899396100104107110113116120
1°1568727679838689939699101104107
1°3062656972767982858790939598
1°4557616467707376788183868890
2°0053576063656871737678808285
2°1550535659626467697173767880
2°3048515356596163656870727476
2°4546485153565860626466687072
3°0044464951535658606264656769
3°1542444749515355575961636566
3°3040434547495253555759616264
3°4539414446485052535557596062
4°0038404244464850525355575860
4°3036384042444547495052535556
5°0034363840414345464849515253
5°3032343638394143444647485051
6°0031333536383941424445464849
6°3030313335363839414243444647
7°0029303234353638394042434445
8°0027283031333435373839404142
9°0025272830313233353637383940
10°0024252728293032333435363738
11°0023242527282930313233343536
12°0022232426272829303132333435

Table 3—Five Inches Unbalance

   Elevation of outer rail (inches)
0 12 1112 2212 3312 4412 5512 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°30120125131136141146151156160165169173177
0°40104109113118122127131135139143146150150
0°509397101106110113117121124128131134137
1°0085899396100104107110113116120122125
1°157679838689939699101104107110112
1°306972767982858790939598100102
1°4564677073767881838688909395
2°0060636568717376788082858789
2°1556596264676971737678808284
2°3053565961636568707274767779
2°4551535658606264666870727476
3°0049515356586062646567697172
3°1547495153555759616365666870
3°3045474952535557596162646567
3°4544464850525355575960626365
4°0042444648505253555758606163
4°3040424445474950525355565859
5°0038404143454648495152535556
5°3036383941434446474850515253
6°0035363839414244454648495051
6°3033353638394142434446474849
7°0032343536383940424344454647
8°0030313334353738394041424344
9°0028303132333536373839404142
10°0027282930323334353637383940
11°0025272829303132333435363738
12°0024262728293031323334353536

Table 4—Six Inches Unbalance

   Elevation of outer rail (inches)
0 12 1112 2212 3312 4412 5512 6
Degree of curvatureMaximum allowable operating speed (m.p.h.)
0°30131136141146151156160165169173177181185
0°40113118122127131135139143146150154157160
0°50101106110113117121124128131134137140143
1°009396100104107110113116120122125128131
1°15838689939699101104107110112115117
1°30767982858790939598100102105107
1°4570737678818386889093959799
2°0065687173767880828587899193
2°1562646769717376788082848587
2°3059616365687072747677798183
2°4556586062646668707274767779
3°0053565860626465676971727476
3°1551535557596163656668707173
3°3049525355575961626465676970
3°4548505253555759606263656668
4°0046485052535557586061636465
4°3044454749505253555658596062
5°0041434546484951525355565759
5°3039414344464748505152535556
6°0038394142444546484950515253
6°3036383941424344464748495051
7°0035363839404243444546474849
8°0033343537383940414243444546
9°0031323335363738394041424344
10°0029303233343536373839404141
11°0028293031323334353637383939
12°0027282930313233343535363738

[78 FR 16113, Mar. 13, 2013]

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