SpaceX CEO Elon Musk posted on his Instagram page a test run of the electric sled. In his words he said;
Warning, this may cause motion sickness or seizures. This is a test run of our electric sled that would transport cars at 125 mph (200 km/h) through the tunnels, automatically switching from one tunnel to the next. Would mean Westwood to LAX in 5 mins he said.
Click the link to watch