TravInfo is a regional traveler information system in the San Francisco Bay Area. The institutional evaluation examined TravInfo's unique concept of open-architecture and its collaborative public-private partnership to broadly disseminate traveler information and foster a commercial market for privately offered advanced traveler information services. Despite many challenges, the field test was completed, and at its conclusion TravInfo was deployed as an integral part of the Bay Area transportation infrastructure. The institutional evaluation measured the performance of TravInfo's public-private partnership at the organizational level. TravInfo meetings were conducted as open forums to encourage the entrepreneurial participation of members of the advanced traveler information system industry as well as the active participation of local public agencies. Among lessons learned is the importance of adjusting different expectations of the public and private partners, establishing reasonable goals for the field test, developing different scenarios to deal with arising problems, and understanding the value of the public-private partnership.