This was exactly what I was looking for.  I don't use it for the car (yet).  I purchased it to go on my deck stairs for my dog who has knee issues (soon to have surgery on both knees).  He's a 50 pound rescue mutt about the size of a border collie.  The ramp is the perfect width and fit over my deck stairs without any adjustment or other supports needed.  My dog, Foxy, was on it in no time.  The tread is nonstick and the sides are raised to prevent him from falling off.  He loves it and I love it!  I would highly recommend it. It's a great value for the price.