How Did They Know Which Way He Was Going?

An elderly man was arrested for driving on the Wantagh Parkway Sunday night.
Troopers said they received a report of a 71-year-old driver in a white Nissan was seen traveling north in the southbound lanes at about 8:11 p.m.
State police stopped traffic and set up a roadblock where the Nissan had last been seen. When the elderly driver approached, he went past the roadblock, but he was stopped south of the Southern State Parkway, police said.
He was charged with reckless driving, speeding, failing to comply with a lawful police order and driving the wrong way.

They set up a roadblock, and he drove around it?