Erdman Anthony is providing preliminary and final design services for the reconstruction of and capacity improvements to 3.5 miles of I-490, a major six-lane highway that bisects Rochester, including 20 bridges in this section from the Erie Canal to the Genesee River. As part of this project, Erdman Anthony designed the Frederick Douglass - Susan B. Anthony Memorial Bridge (Troup-Howell Bridge) replacement. The resulting design incorporated a 1,180-foot-long, three-member steel arch structure that will be slightly wider than the existing bridge to accommodate 6'-foot shoulders, making it the widest three-member arch in the country. Design features contributing to the bridge's appeal include a low profile that enhances sight distance along I-490, rounded support beams and visible cable support linkages to enhance visual interest, a fanned array of support cables to echo the shape of the arch, and lighted pylons to symbolize the gateway to the City.

Official I-490 Gateway Project Site