|Length:||5 miles (8 km)|
|Route outline (key)|
Lawrence Weston Interchange
Main Article: Lawrence Weston Interchange
The Lawrence Weston Interchange is a complex junction between the M5, M49 and Avonmouth Spur, which leads to the A4. For the M5, it is J18, and has no junction number on the M49. The interchange itself is free-flow and all movements are possible except for vehicles travelling to or from M49 to the M5 northbound.