Khuang Sing Intersection on the Chiang Mai-Lampang Super Highway, crossing the Chotana or Chiang Mai-Fang Road, 1969.   Khuang Singha Intersection, 2008. Many more commercial buildings have popped up along the roads whereas the intersection itself has been expanded into an underpass opened since October, 2007. The underpass was constructed to reduce the traffic congestion and accidents that have occurred at the intersection as well as to increase the efficiency of traffic and transportation in the City for safer and freer traffic.