We propose to measure the propagation time of muon-type neutrinos from the NuMI source at Fermilab to the MINOS detector in northern Minnesota, a distance of 735.34 km. The proposed timing instrumentation will provide an accuracy of 2 ns in the propagation time. With an accuracy in the distance of 0:7 m, we expect to show that the speed of a neutrino diers from the speed of light by no more than two parts in 10 6 . The time-of-igh t instrumentation will also enable a search for slow-moving weakly-interacting particles.