Last Mile

The last mile refers to the final leg of a product's journey through the supply chain — from a local distribution hub, sorting facility, or fulfillment center to the end customer's door. Despite being the shortest physical distance in the shipping process, last-mile delivery is typically the most expensive, most labor-intensive, and most operationally complex segment. It accounts for 41–53% of total supply chain costs, according to multiple industry analyses.

Why Last Mile Is So Challenging

Last-mile delivery is inefficient by design. A delivery truck might stop 120–200 times in a single day, each stop consuming time for navigation, parking, recipient interaction, and proof of delivery. Residential deliveries are particularly inefficient compared to commercial ones — homes are spread across wide areas, recipients aren't always present, and there are no loading docks.

Key cost drivers in last-mile delivery:

• Failed delivery attempts: When no one is home, the carrier must attempt redelivery — adding cost without adding revenue. Failed delivery rates in dense urban areas average 5–15%.
• Urban congestion: Traffic delays reduce the number of stops a driver can complete per shift
• Labor intensity: Last-mile delivery is still predominantly human-driven; autonomous and drone delivery remains limited to pilots
• Fuel and vehicle costs: Short-haul, stop-and-go driving is less fuel-efficient than highway transport
• Address accuracy: Invalid or incomplete addresses cause misroutes and delays

Last-Mile Delivery Models

Carrier networks (UPS, FedEx, DHL, national posts): The traditional model. Carriers aggregate volume across thousands of shippers to achieve density, driving down per-package cost through scale.

Amazon Logistics (AMZL): Amazon has built its own last-mile delivery network of independent delivery service partners (DSPs) and Flex drivers, now handling more than 60% of its own US deliveries.

Crowdsourced delivery: Platforms like DoorDash Drive, Instacart, Shipt, and Lalamove use gig-economy drivers for on-demand same-day or next-day delivery.

Micro-fulfillment: Retailers position inventory in urban warehouses close to customers, dramatically shortening the last mile and enabling faster, cheaper delivery.

PUDO networks (Pick-Up Drop-Off): Alternative delivery to lockers, convenience stores, and collection points reduces failed delivery attempts and concentrates volume for efficiency.

The Cost of Last Mile Innovation

Last-mile technology investment is intense: Amazon has deployed over 100,000 electric delivery vans from Rivian; FedEx and UPS are testing autonomous delivery robots; startups like Starship Technologies operate sidewalk robots in university campuses. Despite these investments, meaningful automation of last-mile delivery at scale remains 5–10 years away for most markets.