What happens when a driver is forced to use a runaway truck ramp

Last week s crash on I70 has a lot of people wondering about runaway truck ramps. Steve Staeger set out to learn how often these ramps are used, and what happens after the truck goes flying up. More local videos here: Subscribe to NEXT: Stay connected: 9NEWS Website: Facebook: Twitter: Instagram: Google+: Snapchat: Denver9NEWS Pinterest: