The sign says “bridge closed ahead” – not for people on foot or with bicycles. Cross the river by entering the sidewalk on the west side of Halsted Street.
Sorry if I’m revealing anyone’s secret. During reconstruction on the Halsted Street bridge over the Chicago River just north of Chicago Avenue, it’s possible to cross into Goose Island and continue on Halsted Street. Construction is supposed to last until May 2012. The west side sidewalk is open. And the Halsted Street bridge over the North Branch Canal of the Chicago River, just south of Division Street, has been open since December.
Looking north from the sidewalk along the bridge.
Looking west at the concrete plant from the sidewalk along the bridge.