I knew someone who lived in a house with a driveway that was very popular with drivers who used it to turn around. He didn't mind people doing it in the day, but it also happened all night and he hated the cars' headlights beaming through his windows.
Drivewayspikes

The Awesomer featured us in their new product line up.
http://theawesomer.com/?s=drivewayspikes

In 1 month "The Drivewayspikes post was incredibly popular with our readers; it's gotten over 40,000 hits so far."

Dude I Want That
 http://www.dudeiwantthat.com/outdoors/tools/drivewayspike-u-turn-deterrents.asp

Yahooooo.Picked up by anothe ronline store

http://www.bonanza.com/items/search?q[catalog_id]=&q[filter_category_id]=&q[in_booth_id]=&q[search_term]=drivewayspikes&q[shipping_in_price]=0&q[sort_by]=relevancy&q[suggestion_found]=&q[translate_term]=true

Come to The Cars of Summer

July 2 thru July 4

WWW.DRIVEWAYSPIKES.COM

  http://www.carsofsummer.com

Drivewayspikes is a unique way to achieve safety. Most people view the rubber “Spikes” a permanently installed device, and drive past without thinking about pulling into the driveway.