CERE's Lars Fredrik Andersson, Associate Professor in Economic History, was interviewed by TV4 in conjunction with Volvo's announcement of their move of the assembly line to Gothenburg. Lars Fredrik means that it's only a matter of time until Volvo entirely leaves Umeå. If a company finds places closer to the market, raw material, suppliers it will simplify the logistical system to the point that it isn't worthwhile to have the factory elsewhere.
Without transportsupport Umeå will be unable to compete with Gothenburg according to Lars Fredrik. See the entire interview from October 22, 2013 here. (only in Swedish)