Horsepower-flush automobiles and the 7,200-mile highway system that accommodates those vehicles, called the autobahn, belong to Germany’s national mythology. For decades, German drivers have relished the ostensible perk of its long stretches of asphalt without a speed limit. But the climate crisis has called this cherished tradition into question, prompting Germans to rethink their relationship to internal combustion engines – and to the autobahn itself, writes Paul Hockenos.