it doesn't matter if it is the only way or best way. you should not be driving over the bridge beyond its legal weight limit otherwise... why would you risk destroying the only way or best way?
that would not be in company's best interest to do that.
According to some internet data about Mr. Zhang troubling, it is still unclear whether the weight of the vehicle was expressed in imperial tons or metric tonnes by Chinese authorities, however, even if expressed in the old imperial format, the outfit’s adjusted weight still comes in at 100 metric tonnes.
By comparison, the maximum permitted gross weight of an articulated vehicle in the UK is 44 tonnes, less than half the mass of this Chinese truck and I couldn't find whether there was a weight limit post sign for that bridge which Mr Zhang I am sure he would of know the limit before crossing it as if he seen it.