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Speed Classes

Speed Class (SPEED_CL/SPEED_CLASS) is a combination of speed category, controlled access, and frontage road. See Speed Categories (SpeedCat) for details about speed categories.

Controlled Access (ContrAcc) identifies roads with limited entrances and exits that allow uninterrupted high speed traffic flow: Y (Controlled Access) or N (Not Controlled Access).

Frontage road (FRONTAGE) indicates that the road (i.e., service road) is a local road that runs parallel to and usually contains the name(s) and addresses of a road with a higher traffic flow: Y (Frontage road) or N (Not a frontage road).

SPEED_CL/
SPEED_CLASS
SpeedCat ContrAcc FRONTAGE
1 1 Y N
2 2 Y N
3 3 Y N
4 4 Y N
5 5 Y N
6 6 Y N
7 7 Y N
8 8 Y N
9 1 N N
10 2 N N
11 3 N N
12 4 N N
13 5 N N
14 6 N N
15 7 N N
16 8 N N
17 1 N Y
18 2 N Y
19 3 N Y
20 4 N Y
21 5 N Y
22 6 N Y
23 7 N Y
24 8 N Y