To be clear, I'm talking about highways with a solid divider and no way to change lanes except taking an exit. Also, I've been in one such jam in the Netherland

To be clear, I'm talking about highways with a solid divider and no way to change lanes except taking an exit. Also, I've been in one such jam in the Netherlands where everybody drives at a consistent 130 km/h max. Reading the responses here, autonomous vehicles going in a coordinated fashion might be the only viable solution.