"Love on a Two-Way Street" is a Soul ballad written by Sylvia Robinson and Bert Keyes in 1968. The song was originally recorded by Lezli Valentine, an artist signed to All Platinum, the record label that Sylvia Robinson co-owned with her husband, Joe. The song was then recorded by The Moments, an R&B vocal group signed to All Platinum subsidiary Stang Records, as filler for their 1968 album Not on the Outside, But on the Inside, Strong!. Sylvia and Joe decided to release the song as a single in March 1970 and it went on to become one of the biggest R&B hits of that year, spending five weeks at number one on Billboard's Soul Singles chart and reaching number three on the Hot 100 chart. Billboard ranked the record as the No. 25 song of 1970. It was also certified gold by the RIAA for sales of one million copies. Willie and The Mighty Magnificents provided most of the musical backing on the song and Bert Keyes created the string arrangement that was overdubbed onto the track while also playing piano on the recording session.

Based on this passage, who wrote the song love on a two way street? Let's give stream of consciousness first:
To answer this question, we should know that: "Love on a Two-Way Street" is a Soul ballad written by Sylvia Robinson and Bert Keyes in 1968.
So, the final answer is Sylvia Robinson and Bert Keyes.