It’s happening: At tonight’s Community Board 7 transportation committee meeting, NYC DOT will present plans for a northbound protected bike lane on Amsterdam Avenue on the Upper West Side.

The first phase of the project calls for a protected bike lane and pedestrian refuges from 72nd Street to 110th Street, which could be implemented as soon as next spring, according to a DOT press release. A second phase south of 72nd Street would follow.

The design will convert one motor vehicle travel lane to a protected bike lane, with pedestrian refuges and dedicated space for left-turning vehicles on some blocks. At intersections with major streets, split signal phases will separate bicycle and pedestrian traffic from turning drivers. At other intersections, the design calls for the “mixing zone” treatment, where bicyclists merge with turning drivers.

The proposal also adjusts commercial parking regulations on the east side of Amsterdam to cut down on double parking.

With bike traffic on Amsterdam growing rapidly and Citi Bike expanding to the Upper West Side, DOT sees significant potential for bike trips to replace thousands of short cab trips in the neighborhood.

Council members Helen Rosenthal and Mark Levine, who’ve previously called on DOT to make Amsterdam safer, both expressed thanks for the proposal in the agency’s announcement.

This is a milestone in a very long and hard-fought neighborhood advocacy campaign for safe streets. You can help the redesign get to the next phase at tonight’s meeting, which starts at 6:30 p.m at the Redeemer Church, 150 West 83rd Street.

Streetsblog will have more coverage tomorrow.