Question: Which technique where the roller coaster is allowed to coast through the ride's circuit through the force of gravity is used in Adventure World since 1991?
Sentence (from "Lift hill"): Upon reaching the peak, the train is then propelled from the peak by gravity and is usually allowed to coast throughout the rest of the roller coaster ride's circuit on its own momentum, including most or all of the remaining uphill sections.
Relevant evidence: Yes