Shame me all you want, I'm not biking my commute in 90/20 degree weather with a backpack full of stuff including a laptop and no reasonable way to listen to music when I have such a comfortable SUV-type car.
Trekz Titanium. Or any other brand of bone conduction headphone. They sound quite good for the price and the fact that I can hear everything else around me at full volume.
Buses work well for hot days, and you can actually use your laptop rather than driving. Buses should have dedicated lanes and arrival times every 5 minutes.
I took a train for a commute for a while and I found it hard to focus on anything on the laptop for fear of missing my stop. Certainly wouldn't have worked for music. The anxiety's just too much in those situations. I like long Greyhound rides though.
