The development of a hovercraft type vehicle would make most IED's pretty much useless against vehicles. Also a group mapping scan system that scanned downwards to show what was in the ground ahead would also improve matters.
The technology is there but is pretty slow at this present moment in time for use by vehicles but has been available for military satellites for many a year.
Guess its a combination of a metal detector type implement, amonia sniffer, combined with ground mapping radar combined with a very fast microprocessor to take account of vehicle movement and stability. Combine the elements from all 4 from a number of different companies and pretty much you would have a working model within a year or less. Course could build it into a remote vehicle driven in front of a convoy like a UAV controlled from elsewhere, a fleet of theses doing a hop further along the route and you have convoy protection. Its doable but question is whether the will is there.