State Troopers to Set Up Sobriety Checkpoint on Garden State Parkway West Trenton, N.J. – The New Jersey State Police Troop \”D\” Traffic Office, in an effort to reduce crashes attributed to driving while intoxicated, will set up a sobriety checkpoint on Saturday, March 7, 2015. Vehicles traveling on the Garden State Parkway in Monmouth County may be stopped between the hours of 6:00 p.m. and 2:00 a.m. Sunday morning. This post was imported from a legacy archive. Please excuse any formatting inconsistencies.