The majority of Americans still drive alone in a car to and from work. But in cities and states across the nation, the commuter population is turning to carpools, public transportation, walking, and bikes.

The number of people who commute more than 90 miles for work has nearly doubled in many cities over the past 10 years.

Londoners face crowded subway trains every morning on the way to the office. What kind of tactics might give them an edge in actually getting a seat?