Carnage on the roads with police hunting killer hit-and-run driver as two die and a major city route is closed down after a string of horror crashes

An elderly pedestrian was knocked down and killed by a hit and run driver on Thursday morning, just hours after a motorcyclist died in one of a series of horror crashes across Queensland overnight.

The man in his 70s was struck by a mystery car at Kittyhawk Drive and Murphy Road in Brisbane’s Chermside at…