Which transportation innovation was first widely adopted by major retailers like Amazon and Walmart to solve the 'last mile' delivery challenge in dense urban areas?

Retail supply chain management has been transformed by innovations in transportation logistics, particularly in solving the 'first mile-last mile' problem. This poll tests your knowledge of a revolutionary product that changed how retailers approach the final delivery stage. The transportation industry's intersection with retail logistics has created new solutions for faster, more efficient product delivery to consumers.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Autonomous delivery drones
Electric cargo bikes with parcel compartments
Underground pneumatic delivery tubes
Sidewalk delivery robots