leaves the expressway and heads north toward the hamlet of Atlanta. I-390 climbs gradually as it continues past Cohocton, eventually turning due west as it descends to an interchange with NY 21 south of Wayland. This exit is also the southern terminus of NY 15, which eventually parallels the Interstate further north. The road climbs again as it makes a gentle bend and widens as it crosses the Livingston County line just south of Dansville and north of Stony Brook State Park. Descending again, it returns to its northwestern heading. North of the village, it climbs to the west side of the wide valley of Canaseraga Creek, giving the roadway a view over the area known locally as the Flats. NY 36 begins to parallel the highway closely, with NY 63 on the far side of the Flats. Just south of the hamlet of Sonyea, NY 36 crosses at a diamond interchange. I-390 turns northeast briefly but resumes its northwest course soon afterward. At this point, the highway follows more level ground, with woods and swamps mostly replacing farmland in the surrounding landscape. After passing rest areas on either side, I-390 reaches the NY 408 exit adjacent to the American Rock Salt mine at Hampton Corners. Here, most traffic bound for the Buffalo area exits to go west to Mount Morris, visible across the Flats from the freeway, where it follows NY 36 north. To the immediate east of the exit, NY 408 ends at NY 63, which carries traffic from the Interstate into Geneseo, the county seat. north of the exit, Canaseraga Creek drains into the Genesee River on the road's west side. The expressway continues north through Livingston County to Geneseo, which I-390 skirts to the south and east. While there is no exit for Geneseo on the part of the freeway that encroaches the village, exit 8, an interchange with US 20 Alternate (US 20A) east of Geneseo, provides the connection. Also accessible from the junction is the hamlet of Lakeville, situated off to the east at the junction of US 20A and NY 15. I-390 continues on, encountering NY 15 north of Lakeville and southeast of Avon. From here north to Rochester, I-390 and NY 15 follow closely parallel alignments. Both highways meet US 20 and NY 5 east of Avon prior to crossing into Monroe County. Monroe County As I-390 heads north through the southern