UK Roads
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A multiplex is a road that is shared by two or more classified roads. Duplexes are very common. Triplexes and quadruplexes are quite rare. In the list, the road that "disappears" is given first, then the road(s) it follows before it "reappears".


Over 10 miles[]

  • A34: M40 junction 9 - M42 junction 4 (77 km)
  • A594 A50-M6-A590-A591-A66-A595 (341 km)
  • A46-A435 Teddington to Alcester (about 20 miles)
  • A435-A46 Teddington to Alcester (about 20 miles) ?

Over 5 miles[]

The SABRE thread on this topic

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