In the two years leading up to the partial collapse of the Vikramshila bridge in Bihar last week, multiple inspection teams and officials raised red flags that were not acted upon, The Indian Express has learnt. According to officials, the partial collapse happened in two stages, beginning with a structural failure in pillar 133 at around 11.55 pm on May 3, followed by a total span collapse at 1.07 am on May 4, which split the 4.7-kilometre-long bridge over the Ganga into two. No casualties were reported. The collapse led to a major disruption of traffic between a large part of Jharkhand and south Bihar on one end, and north and northeastern Bihar, as well as West Bengal, on the other. Traffic from both sides has now been diverted to a much longer route, making the distance between Munger and Khagaria 161 km via the Ganga bridge, up from 14 km over the Vikramshila Setu.…