Beach Road: can one lane do the job?

A one lane road can carry up to 1800 cars per hour at speeds around 30 mph (http://www.unb.ca/transpo/mynet/mty79.htm). But let's be conservative and assume 1600 cars per hour. Now, I counted the parking spaces at the Beach using satellite photos. There are 600 at Calf Pasture, another 100 at Taylor and Shady, and perhaps 100 at Cove Marina: total 800. So, one lane can bring enough cars to the beach to put a new car into every parking space every 30 minutes. Clearly, one lane is sufficient. Congestion will depend not on how many lanes Beach Road has, but on how many attendants and lanes are available to check cars for beach stickers and accept payments. Of course, we already knew one lane could handle the volume because Gregory Boulevard, carrying nearly all of the beach traffic, does fine with one lane. And after Gregory and Fifth Street merge at Ludlow Circle to feed Marvin Street into Beach Road, back ups still don't develop, not even during car and boat shows.