My Experiments

Optimizing My Bike Commute in Santiago, Chile

Bike Commute Map

The normal goal of a commute trip is to minimize total time. But if you are bicyclist you are also concerned with conserving energy or retaining momentum. Since traffic signals are not coordinated for bicycle speeds (or at all) I have developed a system of adjusting my riding speed between each signal to minimize time stopped.

What I call the bicycle game started with counting the number of times I put my feet down, but evolved into a serious data collection effort. Everyday I record the total trip time, riding time, average riding speed, start time, and distance.

In my attempt to optimize my commute I consider three main indicator variables:
– total time,
– percent of total time stopped, and
– average riding kph.

I also compare three riding strategies:
– baseline (just riding)
– timing (trying to not stop), and
– speed (biking as fast as possible)

The following graphs compare each of the indicators for each strategy.

Percent of Time Stopped compared to Total Time

time vs stopped

Average Kilometers per Hour compared to Total Time

time vs speed

Average Kilometers per Hour compared to Percent Time Stopped

stopped vs speed

While more data is needed, it is clear that while the timing game has produced the best individual results (shortest time and an almost zero stopped time commute) it has a large variance. So either I am not that good at it or there are too many factors out of my control (start time doesn’t seem to have a noticeable impact). Riding fast is the most reliable method to minimize total time, but it results in a lot of wasted energy.  Some combination of speed and timing is the most optimal solution, but it might be almost impossible to reliably replicate due to all of the outside factors.

 

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