The deluxe driveway alert is about 2500 reception range. It depends on the certain obstructions, for instance, metal building, dense woods and so on.
Dakota Alert seems to have a great reputation for Driveway Alarms; They make two motion driveway alarms...the DCMA-2500 (wireless range up to 2000 feet plus) and the MURS Alert (with a wireless range up to 2 miles !).
They're usually set to be calibrated, so you have a good amount of say in the matter. In general, you should set it for about ten feet.
That depends how wide you want the driveway ! A driveway 10 feet wide would be 35 feet long, but - a driveway just 8 feet wide just 7 feet wide would be 50 feet long !
You cannot block the driveway unless it is your driveway and no other tenants live there. In most states you must be at least 2 feet from the driveway edge.
The average width of a single car driveway is between 10 and 12 feet. As for a double car driveway, it goes up to 20 feet.
87.5 cubic feet
Depends on the transmitter power. Most hobby planes have a reception up to about 500 feet.
4 Feet from either edge of driveway.
199.5 square feet
The standard width of a two-car driveway is 20 to 24 feet wide. A single-car driveway width is between nine and 12 feet wide.
You must park 5 feet away from a driveway.
12ft*143ft = 1716ft2