Some more stupidity? Perhaps following on from Bangkok. In Chiang Mai... From 1st May bikes are to be banned on the airport overpass & the Don Kaew underpass. Chiang Mai Traffic Police have announced that motorbikes are no longer allowed on the Airport Road Flyover and the Don Kaew Underpass, to help prevent accidents and "fix traffic problems." The new laws will begin on May 1, 2016. Source: Chiang Mai City News.