Separate the vehicle from the visitor
Traffic safety can mean a formal purification of the vehicle, a prayer for the driver and passengers, or an amulet carried on a journey. They are not interchangeable. A shrine that accepts a car for kuruma-barai has a vehicle route and its own reception conditions; an ordinary visit or an amulet does not mean that the car was purified.
Shirayama Hime Jinja documents the vehicle service directly. Its official page says it is accepted every day without a reservation, roughly from 8:30 to 16:00, at the vehicle-purification place beyond the north approach. The driver first receives the prayer at the main sanctuary, then brings the vehicle to the purification place; the offering starts at ¥5,000. That is a particular shrine's process, not a universal rule.
Oyama Afuri Jinja also states that vehicle purification can be handled at the mountain-foot office when reaching the upper shrine is difficult, and lists a traffic-safety amulet among its offerings. The car service and the mountain pilgrimage are separate choices. Confirm the current route before driving up.
A temple example
Zōjō-ji lists traffic safety among the intentions for its formal Black Amida prayer at Ankokuden. Its FAQ says there is no general-car parking facility and its access page asks visitors to use public transport. The published information therefore supports a prayer for road safety, but not a vehicle-purification service at the temple. Do not add one by analogy.
What the amulet cannot do
An amulet or prayer is not a promise of an accident-free journey. Keep the vehicle maintained, obey road rules and check weather and road conditions. When a shrine's page gives a specific reception place, time or price, use that information for that shrine only; do not carry it to the next entry in this category.
Sources
This page draws on the following sources, most of them in Japanese. Details checked: .
