I thought this might be an interesting survey.

My car commute about 60 minutes round-trip. My bike commute is 100 minutes, if I take the most direct route. So I've bought an 100 minutes of cycling for 40 minutes.

So consider this ratio--time cost quotient (TCQ) = (time spend commuting)/(average car commute time). The lower the quotient, the easier the commute. The quotient would be largely determined by your speed, stop lights, circuitousness of your cycling route compared to your drive, etc. It'd be interesting to compare.

My TCQ is 1.67.

What's your TCQ?