An idling car is horrible waste of carbon burning. Please do everything you can to avoid idling for more than a minute. Suggestions are
Adjust your travel schedule to avoid high traffic
turn off engine if stopped for more than a minute (30 seconds) (link https://www.newroads.ca/blog/reasons-to-stop-idling-vehicle/ )
Idling in front of schools is unhealthy for the children and school staff. At a minimum turn off the engine and better yet, walk, bike or carpool.
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