When To Merge?

How do you merge? Different strategies work for different traffic conditions.

Studies suggest the zipper merge works well for slow moving, dense traffic conditions, while the early merge works well for open stretches of road.

Evan Sernoffsky and Sam Machkovech join Here & Nows Robin Young to discuss different merging strategies, and whether people will follow what the science suggests.


  • Evan Sernoffsky, staff writer for the San Francisco Chronicle. He tweets @EvanSernoffsky.
  • Sam Machkovech, technology reporter for Ars Technica. He tweets @samred.
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