From here traffic on US 6 grows lighter as it parallels I-84 for the next 17 miles (27 km). Trucks going through this stretch are limited to 10 tons (9.1 tonnes). It slowly traverses up the Shawangunk Ridge alongside the Interstate Highway and then down again. Just before exit 3, it crosses under I-84 again. After putting at least a mile between the two, US 6 starts to run a long straight course, as Grand Army of the Republic Highway, through the wetlands of Greenville, then through gently rolling hills taking it to South Centreville, where Minisink Valley High School and the district's other schools are concentrated. At the hamlet of Slate Hill, NY 284, another route down to New Jersey, comes in from the south.