How do you slow down a tractor trailer?

To slow down a tractor trailer, the driver should gradually apply the brakes, allowing for a longer stopping distance due to the vehicle's weight. It’s important to downshift to lower gears, which helps control speed on downhill grades. Using engine braking by releasing the accelerator and engaging the engine brake can also assist in slowing down without over-relying on the brake system. Always maintain a safe following distance to react appropriately to traffic conditions.