The lunar rover turned out to be well worth the rapid development schedule. On the first three lunar landing missions — Apollo 11, Apollo 12, and Apollo 14 — astronauts covered a total combined distance of 4.4 miles. With a rover, Apollo 15 more than tripled that distance covering a total of 17 miles. Apollo 16 covered slightly less ground, just 16.8 miles. The final lunar Apollo mission, Apollo 17, that got the most out of its rover. In December of 1972, Gene Cernan and Jack Schmitt traveled 4.5 miles from their landing site, which was further than any other crew had gone, covered a total distance on the surface of 22.2 miles, and reached a top speed of about 11.5 miles per hour.