I work on the Pershore Road, about half a mile from the scene. Underspass where the accident happened is near the central Mosque - it's part of a large ring road and though its supposed to be 40, that stretch would run for probably a mile before you hit any traffic lights, so dare say a lot of people get carried away. Dunno if there are speed cameras there, but if not, there should be. Tragic for the taxi driver and his passengers.
Am surprised about the lack of pile ups on the Aston Expressway - thats a 50 zone and they don't have any barriers between the roads (its a blank lane, which you can use in rush hours) though there was a big incident years ago when a motorbike used that lane and the drain collapsed.