These convey your robot in the direction of the arrows if it is on the conveyor belt during Board Element Activation. Blue conveyor belts (showing 2 arrows per space) can convey robots 2 spaces if the first conveyance is from a blue belt space to another blue belt space. There are exceptions:

Once Smash Bot has conveyed off the blue belt, it is no longer on the conveyor belt, so it does not convey a second space. Since the conveyor belt conveys it off the belt, the blue conveyor belt is no longer under it to convey it a second time.

If a conveyor belt would convey a robot onto a space that is occupied by another robot, the robot in motion will stop on the last space of the conveyor belt. It does not push the robot in its way. (A movement card in the next register certainly would though!) Additionally, if a robot on a blue conveyor belt would convey onto an occupied green conveyor belt space, the robot on the blue conveyor belt stops.

Note that all robots on conveyor belts of a particular color are conveyed at the same time. They convey in tandem in the direction of the arrows, so a robot on the same conveyor belt as your robot will convey along with your robot as you convey down the belt. Sometimes, this simultaneous conveyance can cause 2 robots to try to enter a junction space at the same time. If this occurs, neither robot enters that space.

In this example, both robots would end their conveyance on the same conveyor belt space. In this instance, they each convey 1 space and then stop, leaving the junction space empty.