In this system of business listings we differentiate car delivery from car transport and transporters as we think of transporters moving vehicles accross countries, during house moves or for factories moving many cars. We think of car delivery as local deliveries or vehicle movements to a motorshow or between dealerships.
The best way to avoid a very heavy trailer from snaking is to load it correctly. Make sure that the weight is toward the front and there is little or no rear overhang.