Some folk park way down here and walk a somewhat lengthy stretch of road (past many, many other cars), up the hill, to the lower cable station where they invariable queue to get their spot in the cable car.
I normally drive to the lower cable station, drop off my passengers, and continue past, where there's normally parking about 500 meters up the road.
One thing to bear in mind when you plan a trip up Table Mountain is to buy your tickets online from the official Table Mountain Aerial Cableway site. You'll get a 10% discount and get to skip the last part of the queue - just like the VIP you are. ;)