I have been looking into a driveway alarm for awhile, I had a cheapo that would go off with grass moving or headlight glare.
I bought this model guardline driveway alarm. It allows up to 4 sensors all with different alarm sounds. So you could have one on the driveway, one in your garage, or one in the back of your property.
It is very easy to set up, and in the past week I have had zero false alarms. So far it works great and well worth the 100$
http://m.ebay.com/itm/Professional-Wireless-Driveway-Alarm-w-Lifetime-Warranty-by-Guardline-/112508012648?epid=1137350824&hash=item1a32000868%3Ag%3AlVIAAOSw241Yd%7EKz&_trkparms=pageci%253Ab92fd46b-8a6c-11e7-a7b6-74dbd1800f52%257Cparentrq%253A1efe18cf15e0ab1cb1d8099dfffd253d%257Ciid%253A2