Several inconsiderate drivers who were accustomed using a service alley near where I work as a shortcut didn’t realize that it was closed and have barely avoided running their cars into construction equipment. There are signs; but they are not visible far enough away at the speeds they were going. Speeding through a narrow alley is a bad idea even if there wasn’t any construction. Of course, they are much too impatient to go around a few blocks on one-way streets.