Road work may slow down drivers traveling on New Hampshire Avenue at Adelphi Road in Silver Spring.

The Maryland State Highway Administration recently began a $1.3 million project to widen New Hampshire and create an additional through lane at the intersection.

Watch for single lane closures on New Hampshire Monday through Friday between 9 a.m. and 3 p.m. There may be additional lane closures over night, especially as the work nears completion in spring 2012.

State officials said the project will also include:

• Grinding and resurfacing the road.

• Improving drainage.

• Installing new signs, pavement markings, guardrails and landscaping.

• Upgrading sidewalks and ramps.

• Replacing curbs and gutters.