Twisted horseshoe roll

Roller coaster elements are the individual parts of roller coaster design and operation, such as a track, hill, loop, or turn. Variations in normal track movement that add thrill or excitement to the ride are often called "thrill elements" or "thrill factor".

A brake run on a roller coaster is any section of track meant to slow or stop a roller coaster train. Brake runs may be located anywhere or hidden along the circuit of a coaster and may be designed to bring the train to a complete halt or to simply adjust the train's speed. The vast majority of roller coasters do not have any form of braking on the train but rather forms of braking that exist on track sections. One notable exception is the scenic railway roller coaster, which relies on an operator to manually control the speed of the train.

On most roller coasters, the brakes are controlled by a computer system, but some older wooden roller coasters have manually operated brakes. These are controlled by large levers operated by the ride operators.

Single-position lap bars on wooden roller coasters are sometimes referred to as "buzz bars," a slang term named for the buzzing sound that some bars make as they lock or release. The term can be misleading as the buzzing sound only occurs on Philadelphia Toboggan Company (PTC) trains when the solenoid that releases the bar is out of alignment. There are other train types, such as NAD and even some PTC trains, that feature a single-position lap bar that has a mechanical release and therefore does not produce a buzzing sound. Most parks have switched to individual ratcheting lap bars, similar to the lap bars found on steel coasters. Ironically some of the earlier ratcheting lap bar conversions use a solenoid release and can also produce a buzzing sound. It can be argued that single-position buzz bars give more air time on roller coasters, as ratcheting lap bars tend to lock further during the ride in many installations.

The traditional "pirate ship" style thrill ride often utilizes this type of restraint, as does the Troika.

A drive tire, or squeeze tire depending on its usage, is essentially a motorized tire used to propel a roller coaster train along a piece of track. Although they are most often used in station areas and brake runs, they can also be used to launch trains at greater speeds. However, they are generally used to propel the train at speeds between 5-8 mph. The Incredible Hulk Coaster at Universal's Islands of Adventure is notable for using drive tires to launch the train up an incline. Some roller coasters, most noticeably Vekoma Roller Skaters (Vekoma's version of a junior coaster) and Zierer Tivoli/Force (also junior coasters) also use drive tires instead of a chain on lift hills. Drive tires are also used to power other types of amusement rides, such as ferris wheels, Pirate Ships, and other spinning rides. The Olympia Looping traveling roller coaster at Barth,Alpina Bahn and Mindbender at Galaxyland at the West Edmonton Mall also feature a drive tire instead of a chain on their lift hill.

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Wikipedia