Ilford Bridge Interchange is a uniquely shaped junction serving Ilford in East London.
Layout of the original M15 proposal
The junction was originally planned as part of the Ringways during the 1960s and early 1970s. The layout at the time would have been a roundabout with the M15 passing below. The southbound exit slip would have avoided the roundabout completely.
The M15 along with the rest of the Ringways was scrapped after 1973 but was resurrected during the 1980s and built to a lower standard as an all-purpose dual carriageway. The junction if anything is more complex than the original proposal with the A406 passing over the junction and the railway lines immediately to the north.