Trucks owned by the largest shipping and logistics company in the world do not turn left, most of the time anyway.
According to UPS, about 10 percent of the time, it makes sense for UPS drivers to turn left, on quiet neighborhood roads, for example. But in 90 percent of the cases, planning for a right turn is safer and saves time and fuel.
Right turns are 10 times safer than a left turn. According to the National Highway Traffic Safety Association, more than 53 percent of crossing-path crashes involve left turns; only 5.7 percent involve right turns.
If avoiding a left turn takes you around the block, you are still more efficient than idling in traffic, possibly until the light changes again, according to The Washington Post.
