The department did not specify where exactly the checkpoint would be, but did say that Fairfax County would also be conducting its own checkpoint in conjunction.
From an ACPD press release:
On Friday, March 6, 2015 the Arlington County Police Department will conduct a joint sobriety checkpoint with assistance from the Arlington County Sheriff’s Office, Virginia State Police, and the Fairfax County Police Department across two jurisdictions. These enforcement efforts are in support of the U.S. Department of Transportation’s National Highway Traffic Safety Administration (NHTSA) National crackdown program on drunk driving that focuses on combining high-visibility enforcement with heightened public awareness through advertising and publicity.
Officers will stop all vehicles passing through the checkpoint and ask to see the licenses of drivers. Any driver suspected of operating a vehicle while under the influence of drugs or alcohol will be directed to a safe area off the roadway for further observation and possible testing for intoxication.
The maximum penalty in Virginia for the first conviction for driving under the influence is 12 months in jail, a $2,500 fine and a 12-month suspension of driving privileges.