I wouldn't want to get hit by a Segway bot, or have it cause wrecks in traffic if its AI wasn't near-perfect. But a pizza-box sized bot that stuck to sidewalks

I wouldn't want to get hit by a Segway bot, or have it cause wrecks in traffic if its AI wasn't near-perfect. But a pizza-box sized bot that stuck to sidewalks could work. A car could just run over it without harm (except to the bot).