An improved waiting area for outbound passengers opened in 1924. A Lechmere–Arlington Center bus route (later route ) was established in 1932; the outbound surface transfer area was paved for use by buses. The route 66 streetcar (later renumbered as the 77, then the ) was the first route to be converted to trackless trolley in 1936. The remaining surface routes out of Lechmere were converted to trackless and later bus over the next three decades. The inbound side surface boarding area was eventually disused; the outbound side was fully converted to a busway and the direction of traffic through it reversed for improved bus operations.