The Highway Patrol was designed by Larry Wood. It is based on a 1977 Plymouth Fury, a car commonly used by police departments in that era.
This casting first appeared in 1978 in the "Flying Colors" series. Model 2019 with Blackwall (BW) wheels is from that year.
The casting features a plastic light bar on the roof and "Highway Patrol" shield logos on the doors. The initial release was in the classic black and white police car livery.
This is one of many police car castings from Hot Wheels. It is similar to the later "Sheriff Patrol" (based on a Dodge Monaco) and is the predecessor to many modern police vehicle models.
While the classic black and white is most common, it was also released in blue and white. Some rare versions exist with the light bar in a different color.