I have been the one on the ramp and will back off on acceleration to allow car on interstate to pass me by so I could then come in behind them. The more I slowed down to allow them to get ahead, the more they slowed down. They have the right of way, keep going. Some people have slowed down to the 30s. Funny thing, in many cases, no one behind them. If they had kept their speed up and would have adjusted and zipped right behind them.
Here in SC they realize people suck zipper merges and have included a section on it in the drivers manual, not that that will help. They had sections about stop signs and stop lights as well....