Transportation planners and decisionmakers need an understanding of how travelers respond to changes in the urban transportation system if they are to correctly identify the most favorable opportunities to maximize beneficial use of highways and transit operations. Traveler response to the following 10 types of transportation change are investigated: pool/bus priority lanes, variable work hours, carpooling encouragement activities, buspools/vanpools, area auto restraints, auto facility pricing, transit scheduling/frequency, bus routing/coverage, transit fare changes, and transit marketing/amenities.