Tomorrow night October 18, 2012, the New Orleans Police Department’s Traffic Section will conduct a Sobriety Checkpoint beginning at approximately 9:00 P.M. and concluding at approximately 5:00 A.M. in Orleans Parish. Motorists will experience minimal delays and should have proper documentation, i.e., proof of insurance, and a valid driver’s license if requested.
Most recently they've been spotted At Orleans and Basin and then at Calliope and Carondelet. Both are major points of egress from downtown via I-10. Don't know if this is a pattern or not.