Locomotive speed controller track

Overview
Traincraft adds a bunch of new tracks. You will find them in the transportation tab once Railcraft is installed

Usage: Locomotive speed controller track has five states. Each state will set the speed of a passing locomotive to a certain percentage of its max speed. States:
 * 20% of max speed
 * 40% of max speed
 * 60% of max speed
 * 80% of max speed
 * 100% of max speed

Use a  crowbar to change the states of the track

Recipes
Crafted inside vanilla workbench, use NEI or something else