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

4-lane interregional freeway (20.178 miles) Free flow travel time is based on speed limit of 65mph