TABLE 5 - Values of Travel Time Savings (VTTS),,,,
$ per person-hour noncommuter car driver,,,,
,Model 1: All attributes assumed to be attended to,,Model 2: Deterministic attribute exclusion,
Attribute,Sample mean,Sample standard deviation,Sample mean,Sample standard deviation
Free flow time,17.80,9.12,18.89,8.08
Slowed down time,17.61,7.73,24.96,11.89
Range: free flow time,–8.30   to 67.31,,–4.30 to 52.49,
Range: slowed down time,–66.91 to 35.69,,–6.53 to 63.26,
Proportion of negative VTTS,2.90,2.32,0.78,0.78
Ratio slowed to free flow time,0.989,0.848,1.321,1.472
Sample size,"3,568","3,568","3,072","2,944"