Most of us have heard that is. As a matter of fact I was just wondering about this the other day. According to Eugene Volokh,
You do have a right to drive, but it's a statutorily recognized and regulated right, not a constitutionally secured one.
The InstaPundit explains why people are always saying otherwise:
... because it's in bold-face type in every "driver's handbook" issued by every state Department of Safety. (Which shows that the people who write those handbooks understand the value of early indoctrination.)
They both make a lot of sense.