It does no good to tell people about the physics of merging into traffic. Either from on ramps, or from one lane to another.
I don't have a problem with anyone jumping in front of me, as long as they keep moving. I don't back off to make more room between me and them. I figure that if they want in front of me, taking up my safety space, then they'd better like me on their ass like an ugly wart.
But just keep moving, dammit! We can space ourselves out more gently and keep traffic flowing. But if you jump into a tight space and hit your brakes because you're too close to the car in front, and now you're having a freakout, it becomes not only MY problem, but the problem of everyone behind me and you, ya little porcupine quill!
Bad driving isn't just dangerous, it's selfish. You don't like the view in your lane, you've got the cruise control on, the car in front of you is going 1.5 mph slower so you amble into the left lane. Sure, you checked the mirror and saw me in the left lane going 5 mph faster than you, but why should YOU have to hit your brakes and reset your cruise control, when you can pull out in front of me and take 10 minutes to pass the schmuck in the right lane?
When you see people cursing you in your rear-view mirror, they are usually justified. You can pontificate and posture all you want, but you can't argue with science.
(h/t to the Beancounter, who has never once even said hello, in my comments or hers. But I like, and link, her blog anyway, the snotty dooshbag!)
One thing I'm proud of about my German bloodlines is that those Krauts understand the science of traffic. On the Autobahn you'll get pulled over and ticketed for cruising in the left lane. It's a crime! It's dangerous, and they know it. You're expected to use it for passing only. That's why they have so few accidents, even at the high speeds. The Germans understand the hazards of speed difference, the idiocy of slowing down to merge into traffic, and the idiocy of slowing down to let someone into traffic flow.
It's expensive to get a license to drive in Germany. And you have to pass a real test. You don't see too many snot-nosed teenagers over there using their accelerator pedal as an extension of their little manhood while their brains haven't fully formed yet.
THE INTERSTATE IS NOT SOME PLACE TO BE "COMPASSIONATE" to the idiot who doesn't understand merging. You are endangering everyone behind you when you slow down to let someone merge from the on ramp. STOP IT!!! If you do anything, speed up and make some room behind you. In the first iteration on that traffic link, you can see that everything's going smoothly until some idiot runs to the end of the ramp and stops. This shortens the accerleration ramp (the true, technical term for that stretch of road you think is for dialing your cell phone) for the big truck that needs every yard of it to get up to speed for the merge. You're being a stupid, selfish, cowardly nincompoop when you chicken out at the end of the on ramp.
Watch that traffic link. Go ahead and try out the different scenarios over there. You may find out that YOU are the idiot everyone is talking about when they describe the awful traffic they encountered on the way home from work.
PLEASE STAY HOME IF DRIVING CORRECTLY SCARES YOU!
And stay home if driving skillfully confuses you, bores you, or is too much of an interruption in your sales calls, arguments, eating, shaving, drum solos, car-tune karaoke rehearsals, or parenting duties.
P.S. Blinkers. Try 'em, you'll like 'em!