A $6.7 million road improvement project on the Thruway in Orange County is about to begin. It’ll cover a 2.5-mile stretch from Woodbury to Harriman. The project includes rebuilding the three lanes of north- and southbound traffic, and the replacement of concrete slabs on the northbound ramps at exit 16 leading to Routes 6 and 17. All of the work will take place overnight to reduce daytime traffic issues, and is expected to wrap up next spring.