 In Merrimack, nighttime lane closures in effect on the Everett Turnpike between exits 12 and 13. In Dover, River Street closed for the summer months related to work on the Dover Waterfront Project. Also in Dover, Portland Avenue, a single lane between Cochico and Chapel Streets until the end of September. In Durham, construction work continues on Madbury Road. The New Hampshire Department of Transportation paving parts of Route 104 in Bristol. And there are temporary daytime road closures on the Route 12A bridge in Claremont.