Driving to work takes about 20 minutes. Riding (in the summer) takes about 40 minutes. So that would be a TCQ of 2.

I ride a lot slower in the winter, probably 50 to 60 minutes depending on the weather. So my average winter TCQ is around 2.75.

I think a big part missing from the formula is prep time. When I drive my car I basically walk out the door, then walk into the office and sit down at my desk. When it's time to go home I hop in the car and drive home.

When I ride my bike, I've got to pack my work clothes, check my tire pressure, then when I arrive I have to change clothes. Have to change clothes again before I head back home, then change out of my sweaty clothes after I arrive. Prep time will add probably at least 10 minutes each way in the summer and 15-20 in the winter.