This is the M4 near London's Heathrow Airport. I took this picture through the windshield of the bus on the way home from Salisbury. I have to say they have done a great job at making the highways around London efficient. There are dedicated lanes between the airport and the city only for buses, taxis, and motorcycles that keep high volumes of people moving quickly. Also, as you can see in the picture, there are digital road signs overhead that change the speed limit as conditions change. I'm willing to bet that big cities in the U.S. have something similar, but I thought it was pretty neat just the same.
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