Watch your speed on Fairfax County Parkway.

Authorities are cracking down on drivers who violate the law on the road, also known as Route 7100, over the next two weeks. The initiative targets speeding; aggressive and reckless driving; texting while driving; and other offenses.

Fairfax police announced last year that they would use an old law Virginia law  requiring drivers to “pay full time and attention” to help curtail practices such as text messaging and using cellphones wile driving on the county’s roads, due to weaknesses in the statute prohibiting those activities.

Police and Virginia state troopers will coordinate the “50 means 50” enforcement with a variety of marked and unmarked vehicles. Authorities plan to deploy motorcycles, sports cars and pickup trucks to help catch the unaware 24 hours a day through April 30.