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This document is in need of update. See old version at HighwayNetworkCoding_Old
Also see https://github.com/BayAreaMetro/travel-model-one/tree/master/utilities/check-network
Input network (freeflow.net) attributes:
| Variable | Description | Example |
|---|---|---|
| A | From node | 20298 |
| B | To node | 20300 |
| DISTANCE | Link Distance (miles) | 14.1 |
| SPDCLASS | Speed Class Type | 19 |
| CAPCLASS | Capacity Class. It determines the capacity (CAP), free flow speed (FFS), and critical speed (CritSpd) of the link. | 19 |
| ROUTENUM | Highway number (e.g. 101, 880, 80, etc). 0 if not applicable. | 101 |
| ROUTEDIR | If ROUTENUM set, one of N,S,E or W. Blank if not applicable. |
N |
| AUX | ?? | 0 |
| YEAR | Year | 0 |
| FFS | Free Flow Speed | 60 |
| FFT | Free Flow Time | 14.1 |
| FT2000 | Facility Type in Year 2000 | 2 |
| GL | County Code. 1=San Francisco; 2=San Mateo; 3=Santa Clara; 4=Alameda; 5=Contra Costa; 6=Solano; 7= Napa; 8=Sonoma; 9=Marin; 10=external | 4 |
| LANES | Number of Lanes | 2 |
| AT | Area Type | 2 |
| FT | Facility type | 2 |
| TOLLCLASS | Toll Code | 0 |
| BRIDGE | Links on bridges. Numbering matches those used in Toll Code | 0 |
| USE | Vehicle restrictions | 1 |
| BRT | Bus Rapid Transit | 0 |
| TOS | Traffic Operations | 0 |
| SIGCOR | Arterial Signal Coordination | 0 |
| OT | Observed Time for Toll Queuing Links | 0 |
Table 6 Highway Network Calculated Link Attributes
| Variable | Description | Example |
|---|---|---|
| METER | Ramp meter present, set If(FT2000=8) | 1 |
| FT | Facility type modified IF (FT=8) FT=5 | 2 |
| FT2000 | Facility type in year 2000 modified IF (FT2000=8) FT2000=5 | 2 |
| CAPCLASS | Capacity class type, set by AT, FT, TOS and SIGCOR type lookup | 19 |
| FFS | Free flow speed, set by CAPCLASS | 60 |
| CAP | Capacity per lane, set by CAPCLASS | 1950 |
| FFT | Free flow time, calculated as (DISTANCE/FFS)*60 or as OT, IF(TSIN=1 & TOLLCLASS=1-100) | 14.1 |
| OT | Observed time, set to FFT If(TSIN=1 & TOLLCLASS=0) | 3.5 |