CEMP-E
TI 850-02
AFMAN 32-1125(I)
1 MARCH 2000
Table 6-2. Design Super-elevation for Curved Track
Design Operating Speed (mph)
Degree of
Curvature
10
15
20
25
30
35
40
0.5
NO SUPERELEVATION
1.0
1.0
REQUIRED
1.0
1.0
1.0
1.5
1.0
1.0
1.5
1.5
2.0
1.0
1.0
1.5
2.0
2.0
2.5
1.0
1.5
1.5
2.0
2.5
3.0
1.0
1.0
1.5
2.0
2.5
3.0
3.5
1.0
1.0
1.5
2.0
2.5
3.0
4.0
1.0
1.0
1.0
1.5
2.0
3.0
3.5
4.5
1.0
1.0
1.5
2.0
2.5
3.5
4.0
5.0
1.0
1.0
1.5
2.0
3.0
4.0
5.5
1.0
1.0
1.5
2.0
3.0
6.0
1.0
1.0
1.5
2.0
3.0
6.5
1.0
1.5
2.0
2.5
7.0
1.0
1.5
2.0
2.5
7.5
1.0
1.5
2.0
8.0
1.0
1.5
2.0
8.5
1.0
9.0
1.0
9.5
1.0
10.0
1.0
DO NOT DESIGN FOR OPERATION IN THIS RANGE
10.5
1.0
11.0
1.0
11.5
1.0
12.0
1.0
Note: Table entries are superelevation in inches.
(2) Spiral length will be determined from equation 6-3.
Ls = 40 x S
Eq 6-3
Ls = Length of spiral (feet).
S = Full super-elevation (inches).
6-7
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