Despite its incredible reach, Amazon has always had to play catch-up with brick and mortar retailers when it comes to getting products in customers' hands. If you're in a pinch, you can normally visit a local store and walk out with exactly what you need. Amazon has taken steps to cut waiting times with same-day deliveries in some cities and then one-hour shipments via Prime Now. The only problem with promising such a short delivery period in some of the world's busiest cities is that traffic can be a nightmare. So to get orders to customers in Manhattan, the Financial Times reports that the company has begun loading small pushcarts with packages and taking them on a more efficient means of transport: the New York subway.