It's the people who hit the gas when they see your signal, that really irk me. In Austin I stopped signaling because it was a punished behavior.
replyMy experience driving in MA and NY was similar, but so often it was because a rusted out shitbox was trying to merge in that would slow down traffic significantly, and not only put me at risk of rear ending them, but being rear ended myself.
replyWhen flows merge, there's turbulence. There's less turbulence if the flows are more closely matched, including speed.
Unless I'm the last car in a line and there's plenty of open space behind me. Then you should just wait until after I've passed before merging, because otherwise you create a little ripple in the flow. A few ripples and you got a wave, and that's how you get traffic.
replySo for the love of gods, if you're merging, even if you signal, match speeds for merging. If you're too slow to match speed, then suck it up buttercup, and hang out in the right lane until there's an opening.