What were Mayor Daley and the previous Transportation commissioners waiting for when it came installing modern and then-innovative bikeway facilities?

Why have Rahm Emanuel, Gabe Klein, and the Chicago Bicycle Program installed every modern and previously-innovative bikeway treatment under the sun in just three days? The project’s not over, but a lot has happened since Monday.

On Day 3 of construction of the Kinzie Street protected bike lane, CDOT builds (photos from the Bicycle Program’s Flickr photostream):

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Bike-only left turn on southbound Milwaukee to Kinzie (perfect)

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Through-intersection bike lane using European-style “yield squares” (okay, they’re actually called elephant’s feet)*

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Same yield squares (elephant’s feet) at driveways.

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Very wide!

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New signage telling turning drivers to stop for people walking across the street and riding their bikes.

*I always forget that Chicago created its first through-intersection bike lane at Sheridan and Ardmore, at the north terminus of the Lakefront Trail, to get bicyclists onto the on-street bike lane network.