A light at the end of the Brussels tunnel?

Brussels is quietly living with a split personality. Above ground, the city is slowing traffic, adding bike lanes and reclaiming space for people. Below ground, a crumbling 12-kilometre web of 1950s road tunnels still funnels a quarter of a million cars a day through the capital. As costs soar and politics stall, is it worth fixing the tunnels — or whether some should disappear altogether.