How many stop lamps are required for vehicles manufactured from 1985 to current?

For vehicles manufactured from 1985 to the present, the requirement is for three stop lamps. This regulation is based on safety standards that have evolved over time to enhance visibility and increase safety on the road. The addition of a third stop lamp, often referred to as the "center high-mounted stop lamp" (CHMSL), provides a clearer signal to drivers behind the vehicle that it is slowing down or coming to a stop.

Having three stop lamps significantly improves the likelihood that other drivers will notice when a vehicle is braking, especially in situations where the driver's visibility of the rear lights may be obstructed. The CHMSL is typically located higher than the two standard stop lamps on either side of the vehicle, making it more prominent and reducing the chances of a rear-end collision.

This requirement reflects ongoing efforts to standardize vehicle equipment to enhance safety across all vehicles. In contrast, earlier models manufactured before 1985 were only required to have one or two stop lamps, which explains the difference.