Dear Reader: We have encountered ramp metering in at least two places. First, in Seattle years ago. Congested, is Seattle. Second, this year in Milwaukee. Congested, is Milwaukee. For those who don't ...
While some drivers may see it as unfair, zipper merging is the quickest way through many of Milwaukee's road construction chokepoints, officials say.
California transportation authorities do not explicitly promote the zipper merge, but studies find it can reduce congestion by 40%.
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