Standard Tree

A Standard Tree is the electronic starting system used in drag racing that counts down to the start of a race using three amber lights that turn on one after another, each separated by half a second.

Think of the Standard Tree like a traffic light designed specifically for racing. Instead of just red, yellow, and green, it has a more complex sequence to give drivers a fair and predictable start. The system is also called a "Sportsman Tree" or "Full Tree" because it's commonly used in amateur and sportsman racing classes.

Before the countdown begins, drivers must position their cars correctly through a process called staging. They first "pre-stage" by moving forward until they break an invisible light beam, then "stage" by rolling forward slightly to break a second beam right at the starting line. Both cars must be staged before the tree activates.

Once both drivers are ready, the Standard Tree begins its sequence. The three large amber lights illuminate consecutively, meaning one at a time, with exactly 0.5 seconds between each light. After the third amber light, there's another 0.5-second pause before the green light appears, signaling drivers to launch.

This timing gives drivers a total of 2 seconds from the first amber light to the green light, allowing them to build anticipation and time their reaction. The predictable rhythm helps ensure fair competition, as both drivers know exactly when to expect the green light.

The Standard Tree differs from the Pro Tree used in professional racing, where all three amber lights come on simultaneously with a shorter delay before green. The Standard Tree's sequential lighting makes it easier for amateur racers to develop consistent reaction times and provides a more forgiving starting system for drivers still learning the sport.