Cities and companies are slowly chipping away at the obstacles. In many urban areas, you can now rent a bike to begin or complete your journey. Some places, like New York City, subsidize them for lower-income residents. On-demand services like Uber and Lyft come when you call, and sometimes cost less than traditional taxis. And then, of course, there is the Great Scooter Invasion of 2018. Across the U.S., electricity-jolted Razor-style scooters have sprung up rapidly. After registering, you can pick them up and drop them off around town. But these modes usually require credit cards, bank accounts, smartphones, the ability to stand or pedal, and confidence riding in traffic. And you have to go it alone, without company or cargo. That leaves out much of the population much of the time. It amounts to discrimination, witting or not.