Iron Spike Maul

Iron Ingot Block of Iron Iron Ingot Crafting Arrow Iron Spike Maul
Stick
Stick

Introduced in Railcraft version 10.1.x and is used to change your standard tracks to switch tracks and junction tracks. You can also craft a stronger version using Steel.

Switch Actuator Lever

Place next to a Switch Track or Wye Track. Must be used manually to switch the track.

There's also a Switch Actuator Motor which can only be controlled by redstone or signaling. You can upgrade a Switch Actuator Lever to a Switch Actuator Motor by crafting it with a Receiver Circuit.

There's also a Routing Switch Actuator Motor controlled by a Routing Table.