HighwayNetworkCoding

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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 Type	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
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