Waterbury fills a bowl in the hilly Naugatuck Valley, with the river running north to south through the middle of the city and neighborhoods climbing the ridges on both sides. I-84 crosses east-west toward Hartford and Danbury, and Route 8 follows the river north toward Torrington and south toward Naugatuck and Bridgeport. The two highways meet downtown at the Mixmaster, a stacked, double-decked interchange that has been a Waterbury landmark for generations. Route 69 runs north to Wolcott and south to Prospect, Route 73 heads to Watertown, Route 63 links Watertown with Naugatuck, and Route 64 leads west to Middlebury.
The Mixmaster is the daily choke point, with short ramps, lane drops and frequent repair work, and I-84 through the center of the city backs up every rush hour. Off the highway, Wolcott Street, Meriden Road, Chase Avenue, Thomaston Avenue and Baldwin Street carry most local traffic, and many of them climb hard out of the valley floor. Some neighborhood streets are steep enough that a car with tired brakes or a slipping transmission makes itself known on the first climb, and a stall halfway up one of them is an awkward place to wait for help.
Waterbury's station sits at the end of Metro-North's branch line, and CT Transit buses cover the city, but most people drive. Waterbury-Oxford Airport in Oxford handles private flying, while airline travelers head to Bradley or the New York airports. The two hospitals, the UConn and Post University campuses and the downtown courts draw steady weekday traffic, and many households commute out of the valley daily on I-84 or Route 8.