http://www.slate.com/articles/business/the_juice/2015/08/start_stop_technology_it_shuts_down_car_engines_to_save_gas_and_it_s_coming.html

When you drive a manual-shift car after a long period of driving only automatics, stalling is part of the territory. But the last few times I’ve done so, while renting cars in Europe, it seems that virtually every time I stopped for a light, the engine shut down, only to chug back to life when I re-engaged the gears. After enduring a series of withering looks from my passengers, I finally spoke up in my defense. Yes, some of the stalls could be chalked up to my incompetence. But most were due to the vehicle’s “start-stop” feature—a quietly revolutionary step toward energy efficiency that is becoming standard in Europe, and may come soon to a new American car near you.