The Lilac Road Bridge is a reinforced concrete arch bridge in Bonsall, California, built in 1978 at a cost of $1,500,000. Its main span is , with a total length of . It was designed by Fred G. Michaels and John Suwada, with architecture consulting by William Wells. This bridge is one of the two overcrossings in San Diego County with this unique arch design, the other being the Eastgate Mall Bridge. When traveling northbound on I-15 it is the noticeably high bridge before the SR 76 exit. References 1978 establishments in California Bridges completed in 1978 Bridges in San Diego County, California Concrete bridges in California Interstate 15 Open-spandrel deck arch bridges in the United States Road bridges in California