An important current policy debate concerns whether the next U.S. federal surface transportation reauthorization should require spending on “enhancements,” which finance projects such as walkways, bike paths, highway landscaping and historic preservation. This issue receives considerable attention, despite the fact that enhancements represent less than 2% of total federal surface transportation expenditures, because it raises questions about future transport priorities, particularly the role of walking and cycling. In other words, should non-motorized modes be considered real transportation.
Why didn’t the chicken cross the road?
Because pedestrian Level-Of-Service was below “C”.
The graph below shows the most recent USDOT vehicle-travel data covering the last 25 years. Although vehicle-miles of travel (VMT) grew steadily during most of the Twentieth Century, in recent years the growth rate stopped and even declined a little. It is now about 10% below where it would have been had past trends continued.