

It makes a huge difference if you yourself are paying attention, which seems hard wearing headphones.
What about the driver? Did he listen to the radio? If it seems so hard to pay attention while wearing headphones, why is it still allowed to sell car radios?
wearing high-viz clothing […] how little people are aware of blind spots
How does wearing high-viz clothing help you when you are in a blind spot? And why does no one ask which colour the taxi was? Was it high-viz or maybe gray or black like most cars?
Where I’m from, drivers are sitting in sound proofed boxes called cars. The newer the car, the better the sound isolation. So unless the taxi was a convertible, the comparison is invalid.
When I’m wearing my headphones I can easily understand someone talking to me. When I’m sitting in my car I don’t hear a word when someone is talking outside the door.