The “322 corridor” covers the entire length of the state! From West Shenango Township southeast (at the Ohio border) to the Commodore Barry Bridge over the Delaware River in Chester (at the New Jersey border. My folks lived close to 322 in Downingtown. Where are you, just out of curiosity.
Sorry to hear you have to deal with this. It’s going to be a real pain in the keister.
We’re in the upper Chichester area, about a mile before it already expands into 2 lanes each way towards I95.