| <all other values> |
| 0 - ON - OPPOSITE DIRECTION |
| 1 - ON |
| 2 - UNDER - SINGLE |
| 3 - ON - 3RD PRIORITY ROUTE |
| 4 - ON - 4TH PRIORITY ROUTE |
| 5 - ON - 5TH PRIORITY ROUTE |
| 6 - ON - 6TH PRIORITY ROUTE |
| 7 - ON - 7TH PRIORITY ROUTE |
| 8 - ON - 8TH PRIORITY ROUTE |
| 9 - ON - 9TH PRIORITY ROUTE |
| A - UNDER - 1ST PRIORITY ROUTE |
| B - UNDER - 2ND PRIORITY ROUTE |
| C - UNDER - 3RD PRIORITY ROUTE |
| D - UNDER - 4TH PRIORITY ROUTE |
| E - UNDER - 5TH PRIORITY ROUTE |
| F - UNDER - 6TH PRIORITY ROUTE |
| G - UNDER - 7TH PRIORITY ROUTE |
| H - UNDER - 8TH PRIORITY ROUTE |
| I - UNDER - 9TH PRIORITY ROUTE |
| 0 - UNKNOWN |
| 3 - GRADE AND DRAINED EARTH |
| 20 - GRAVEL OR STONE |
| 30 - BITUMINOUS |
| 31 - BITUMINOUS OVER GRAVEL OR STONE |
| 60 - ASPHALT |
| 65 - ASPHALT OVER PORTLAND CEMENT CONCRETE |
| 69 - ASPHALT OVER ASPHALT |
| 70 - PORTLAND CEMENT CONCRETE |
| 74 - PORTLAND CEMENT CONCRETE NOT REINFORCED |
| 76 - PORTLAND CEMENT CONCRETE FULLY REINFORCED |
| 77 - PORTLAND CEMENT OVER PORTLAND CEMENT |
| 79 - PORTLAND CEMENT CONCRETE OVER ASPHALT |
| 81 - BRICK |
| 92 - COMBINATION SURFACE |