Block Brake

A block brake divides a coaster's circuit into separate independent sections called blocks, each designed to hold exactly one train at any time. If a train ahead slows or stops, the control system automatically holds all following trains at their block brake positions. This safety architecture allows parks to operate multiple trains simultaneously — dramatically increasing hourly capacity — without any risk of collision between trains.

Block brakes are positioned at points where a stopped train will not roll backward under gravity, typically on a flat section or slight uphill. They use either magnetic eddy-current brakes (contactless, no wear) or friction brake fins. The mid-course brake run (MCBR), positioned roughly halfway through a layout, is the most visible type of block brake. When MCBR brakes trim speed excessively — a common enthusiast complaint — airtime hills and inversions later in the layout feel less intense than the designer intended.