Parece que esta é uma novela (então novela) chamada Código Três. O autor foi Rick Raphael.
Get in Beulah, the massive 60 ft long freeway cruiser and patrol the law enforcement lane of tomorrows freeways with 2 male troopers and a female EMT in this Heinleinesque novella.
The freeways are a mile wide with lanes crossing over from 100mph to 400mph. The cruiser patrols the middle lane and in addition to being jet powered, had a an emergency surgery, food and sleeping quarters for the crew, a crane, and much more stuff including monitoring gear and a pair of .25 cal machine guns mounted up front. Hand out citations, clear wrecks, rescue people, fight the bad guys deliver a baby and chuckle at the repressed sexual tension between the crewmembers.