Harry Kao from Berkeley, CA has a creative series of maps and visualizations showing different commute times.
At Transit Distance, Harry provides several animations which show the distance and time taken to travel to different areas via public transportation and walking.
From his site:
“These animations of Portland, Oregon show the distance that can be traveled via public transit and walking. The dark gray border represents the maximum extent of travel given the time constraint indicated at the bottom of the frame. The shading within the boundary indicates the travel time. I assume a walking speed of 5 km/hr along roads and 3km/hr off-road.”