Vehicular

Philippine motorcycle riders wear masks to deflect vehicular exhausts in heavy traffic.

Streets that are usually packed with pedestrians, scooters and vehicular noise have taken on the quiet aura of a holiday.

vehicular homicide

Ernest had a fear of vehicular travel, and ended up walking everywhere.

vehicular language

English is used as a vehicular language in many business settings.

Latin was a vehicular language for natural philosophers and others from the late Renaissance to the late 18th century.