Be prepared for major delays — or at least know what delays might look like this summer. That’s what the Massachusetts Department of Transportation wants regional drivers to learn this coming weekend.
As part of what MassDOT is calling a “dry run” in the lead-up to a major bridge-replacement project on Commonwealth Avenue, the state will shut down one lane on the Massachusetts Turnpike between the Allston interchange and the Beacon Street overpass in Boston — in both the eastbound and westbound…