Number | Variable names | Data source |
1 | AADT | Control Section Analysis System (CANSYS) database |
2 | Segment length | |
3 | Lane width | |
4 | Shoulder width | |
5 | Maximum speed limit | |
6 | Number of lanes | |
7 | Shoulder type | |
8 | Surface type | |
9 | Functional classification | |
10 | Rumble strip presence | |
11 | Degree of curve | |
12 | Median type | |
13 | Median width | |
14 | Cross slope | |
15 | Area type(rural/urban) | |
16 | Presence of curve | |
17 | Percentage of heavy vehicle | |
18 | International Roughness Index (IRI) | Pavement Management Information System (PMIS) database |
19 | Presence of on or off ramps | Google map |
20 | Side friction coefficient | Kansas Department of Transportation (KDOT) |
21 | Access density | KDOT video-logs |
22 | Density of trees | Google map |
23 | Density of poles/mile | Google map |
24 | Roadside Hazard Rating (RHR) | KDOT video-logs |
25 | Number of interchanges on freeway segment | Google map |