Here's what I did with my Prius this week. I put an Allen three-bike rack on the back, me plus two other riders inside, plus camping and clothing duffles for each of us. The car had room for maybe two more bags before being stuffed to the gills. Then we drove 280 miles north to St. Ignace, MI to meet the tour group for a 325 mile 6-day tour around the Upper Peninsula of Michigan. With the bikes, 37 mpg on the highway. Same vehicle normally will give me 44 mpg without bikes cluttering up the airflow
I guess a Prius is a vehicle that can be used to transport bikes.