There are a lot of layers to the transportation onion. One of California's biggest problems is a law they passed that says anyone contracted by you is considered an employee. Most freight forwarders do not have their own equipment. They sub pick ups and deliveries out to small mom and pop carriers that may own and operate a couple of trucks. They can no longer sub this work out because now they would be considered employees and these small companies cannot afford the cost associated with more employees. Thus the driver shortage. It isn't actually a shortage of drivers, its that the companies that handle the distribution of the freight cant handle the distribution. I believe the law was put into effect to alleviate some sort of Lift or Uber issue. This is just one of the biggest issues of which there are a few.