Sometimes I am sitting in certain types of traffic where there are lines of cars that don't move for a minute or more then only move forward a couple car lengths. This is not on a highway but in places where speeds are never expected to be more than (e.g.) parking lot speed. This got me to wondering, in some cases I could easily cut out 5 to 10 minutes of idling per day by simply stopping the engine whenever I stop and then restarting it as soon as the car a couple ahead of me starts to move. Certain rather annoying stop lights last up to 90 seconds red so I could also fairly safely cut the engine as soon as I came to a complete stop if the light had just turned red shortly before I reached it and save even more.
I drive a fairly recent model vehicle, less than 5 years old. My car has a "push to start" button and takes under one second to fully start, it seems like about 1/2 but it's kind of "too short to accurately time" but slightly more than instantaneous. It definitely seems faster than I recall it taking to start when I had a manual ignition. In my research some articles mention that hybrid vehicles (which automatically stop and start a lot during stop and go traffic, at lights, etc.) have a special starter system which has a longer life because it uses lower RPMs. I don't know if the "push to start" cars have a similar system, if they sit somewhere between a conventional starter and a hybrid starter, or if they have a conventional starter. I have read that conventional starters can be worn out possibly costing more to be replaced than the gas saved by stopping and starting frequently, but it's unclear if this applies to newer cars.
Conversely, I have also found articles such as this one which claim you should turn off your engine any time you are idling more than ten seconds. They claim "Frequent restarts are no longer hard on a car's engine and battery. The added wear (which amounts to no more than $10 a year) is much less costly than the cost of wasted fuel" which seems to totally ignore starter wear.
What I'm looking for is a quantifiable number such as how much it costs in starter wear to turn off the ignition (or more accurately to start the car up again) as this would provide a more accurate way to assess the trade-off between fuel savings and maintenance costs.