Getting a flat tire can be a major headache, especially if your jack isn't cooperating. But things can actually get worse, as many new cars don't even have spare tires anymore. For semi-truck drivers, ...

Semi-trucks are some of the longest, biggest, and heaviest vehicles on the roads. Semi-trucks -- and here's what "semi" means on a semi-truck-- are wide, averaging 8.5 feet, and can reach 70 to 80 ...