Solution is correct, but you'll never outshine others' headlights shining into your eyes. It's more important that others' bright headlights adjust quickly enou

Solution is correct, but you'll never outshine others' headlights shining into your eyes. It's more important that others' bright headlights adjust quickly enough that they do not shine into your eyes. Since the advent on Xenon lights headlights need to automatically adjust so they don't blind drivers. They are just not fast enough or smart enough (shining over a hill crest).