Travel Time Reliability Reference Manual/Availability of Data

Here are some graphs and data for an 6-lane urban freeway (I-43/I-894 near Milwaukee) and 4-lane interregional (I-94 west of Eau Claire). I realize the corridor lengths are much different, but the options were limited for non-urban interstates which had more than just a couple TMC points and the urban corridors tend to be shorter. In this case, we actually have more data for I-94. The reliability indices follow what we’d expect with the more rural freeway performing better. I had to use the 70th percentile travel time for the free flow travel time on the urban freeway because using the speed limit would have led to a mean speed less than the free flow. Let me know your thoughts. 6-lane urban freeway (4.34875 miles) Free flow travel time is based on the 70th percentile travel time Reliability Index Value TTI 1.007 BI 0.257 OPT 94.900 PTI 1.266 TTI80 1.021 MI 1.4 Travel Time in minutes Mean 4.583 Free Flow 4.550 95th % 5.762 80th % 4.648 97.5th % 6.466 4-lane interregional freeway (20.178 miles) Free flow travel time is based on speed limit of 65mph Reliability Index Value TTI 1.034 BI 0.058 OPT 98.400 PTI 1.094 TTI80 1.038 MI 1.150 Travel Time in minutes Mean 19.261 Free Flow 18.626 95th % 20.378 80th % 19.327 97.5th % 21.421 500px|Availability of data on 6-lane Freeway in January 500px|Data Availability for 6-lane Urban Freeway in January 500px|Data Availability on 4-lane Inter-regional Freeway in January 500px|Availability of Data on 4-lane Inter-regional Freeway in January 500px|Travel Times for 6-lane Urban Freeway in January 500px|Travel Times for 4-lane Inter-regional Freeway in January