whats the difference between block brakes and brakes?

Brakes simply slow the train down. Block brakes do the same, but they additionally create a block section that can potentially stop the train. A standard roller coaster will have three basic block sections: the end of the station, the top of a lift hill, and block brakes at the end. Some coasters will have a mid-course brake run in the middle of the coaster and/or an extra brake run close to the end brake run, allowing for four or five block sections.

Only one train is allowed between block sections at a time, so if you have three total block sections--i.e. station, lift hill, and end block brakes--you can run up to two trains. Likewise, if you have six block sections, you can run up to five trains, though this is really only recommended for rides with single car trains.

Block brakes should not be placed too close to one another. They're generally best placed directly after standard brakes so that the train is already slow when it hits them, since the purpose is to stop the train in case of emergency.

Most of the saved default tracks in RCT3 run continuous circuit mode with the block section box checked. Look at the wooden roller coasters, for example, to see where the basic block sections are located.

thanks i will do that

Also, just a note that Terry missed, in RCT3 you can use block brakes as "boosters" to propel coaster trains forward rather than having to use chain lifts, although this only works on certain coaster types.

ok that 's an interresting note thanks)

Another thing to watch out for is that block brakes will slow down a bit slower than brakes, but the train will always leave them at the specified speed, meaning there can be some sudden stops at the end of the block section.