Traffic merges on to I-40 from Miami Boulevard at exit 281. Ramp meters with stop-go lights will be installed at some Interstate 540 interchanges in northern Wake County to smooth on-ramp flow.
Traffic merges on to I-40 from Miami Boulevard at exit 281. Ramp meters with stop-go lights will be installed at some Interstate 540 interchanges in northern Wake County to smooth on-ramp flow. Takaaki Iwabu 2013 News & Observer file photo
Traffic merges on to I-40 from Miami Boulevard at exit 281. Ramp meters with stop-go lights will be installed at some Interstate 540 interchanges in northern Wake County to smooth on-ramp flow. Takaaki Iwabu 2013 News & Observer file photo

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January 18, 2016 6:40 PM

Road Worrier: With meters and zippers, NCDOT separates Early Mergers from Late Mergers

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