From the Pennsylvania manual for applying for a motorcycle learners permit:

"Smaller vehicles appear farther away, and seem to be traveling slower than
they actually are. It is common for drivers to pull out in front of
motorcyclists, thinking they have plenty of time. Too often, they are wrong."

So, not only is there the assumption that any car is faster than a bike, a bicycle or motorcycle seems slower!

(Apologies if this has been posted before.)