# Automotive “Start/Stop” Systems -? **URL:** https://boards.straightdope.com/t/automotive-start-stop-systems/1019820 **Category:** Factual Questions **Created:** [June 18, 2025, 10:33pm UTC](https://boards.straightdope.com/t/automotive-start-stop-systems/1019820 "2025-06-18T22:33:48Z") **Posts on this page:** 1 **Showing post:** 3
### Author: ![LSLGuy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lslguy/32/5813_2.png) [@LSLGuy](https://boards.straightdope.com/u/LSLGuy) #### Post date: [June 18, 2025, 11:22pm UTC](https://boards.straightdope.com/t/automotive-start-stop-systems/1019820/3 "2025-06-18T23:22:20Z")
There’s a short digression on this topic from earlier today. It starts here and runs for 10 or 15 posts: > [@How much time is spent waiting for tech "buffering/connecting/signing in"?](https://boards.straightdope.com/t/how-much-time-is-spent-waiting-for-tech-buffering-connecting-signing-in/1019701/25): > > The auto start/stop drives my wife nuts. I’m able to ignore it. On my car, it is turned off with a button. The Active Braking has helped me twice. Once, I had forgotten I pulled my bike out of the garage. It was sitting in my driveway right behind my car. I got in my car and tried to back up, but was stopped. Sure - stupid of me, but glad I didn’t hit my bike. Another time, I was driving home, which involves a left from one busy road to another. There is an immediate right driveway aft… This post has cites to actual data. Short version: It works a LOT better than the skeptics assume. > [@How much time is spent waiting for tech "buffering/connecting/signing in"?](https://boards.straightdope.com/t/how-much-time-is-spent-waiting-for-tech-buffering-connecting-signing-in/1019701/31): > > They do save gas, but it really depends on how much time you spend stopped on a particular trip. The following article (with [data from the SAE](https://www.sae.org/publications/technical-papers/content/2023-01-0346/)) says 7-26% fuel savings. SAE reports a 7% savings on the Federal Test Procedure, and a 26% savings on the New York City Cycle. So probably barely any savings on a highway trip with only a very few stops that don’t last long. Potentially lots of savings on trips where you spend a long time waiting for traffic lights. It isn’t just some green washing to … --- _[View the full topic](https://boards.straightdope.com/t/automotive-start-stop-systems/1019820)._