Electric Bicycles can be transported on a standard vehicle rack so long as the weight limits are adhered to. We generally recommend a hitch-mounted rack for the most stable transport possible.
Take a look at the following link to our E-Bike Buyers Guide which highlights the best ways to transport an EBike:
https://www.evelo.com/buyers-guide/appendix-a-transporting-e-bikes/
Also, here’s our eBikes 101 video which talks a bit about traveling with your eBikes: https://www.evelo.com/blog/e-bikes-basics-for-rvs-couples-and-fun/