Video shows the victim's vehicle outside his Riverside home, where he drove after being wounded the car-to-car shooting.
The victim was taken to a hospital and treated for a wound to his right shoulder. A bullet was lodged in the man's hand, an injury that will require surgery.
Riverside police said the shooter drove off in a silver sedan.
A shooting was reported on the westbound 91 Freeway near the Central Avenue off-ramp just after 2:50 p.m., but it's unclear if the two incidents are related.
60 Freeway crash: Man was shot while driving with 2 teen sons in truck
This comes a day after a father died after being shot and subsequently crashing on the 60 Freeway in Hacienda Heights. The incident injured the driver's two teenage sons, who were passengers in the vehicle, and prompted a search for the shooter.
City News Service contributed to this report.