Donna, we went north on that route back in August - we took the Commodore Barry over to I-95 in Chester, then I-476, the "Blue Route" north to the mid-county interchange where the Schuylkill Expressway, the PA Turnpike, and I-476 as the Northeast Extension all come together. We got off there and went up 202 north into Jersey, and took that all the way to Bridgewater NJ where we hopped on I-287. 202 in Jersey was not all that bad, but parts of it through Bucks County in PA were stop and go for a bit - and this was on a Friday in the summer. If you're coming SOUTH, it's probably not all that bad, depending on your tolerance for stop-and-go traffic. I can take it for a dozen or so miles, but after that it gets really tiresome. In any case, I assume you'll be taking I-476 south from the Turnpike, then Route 1 west to Jennersville. That won't be bad, but the Blue Route can get backed up during rush hours - on weekends, its not bad at all, to my experience.
And you're right, the I-476 in PA which is the Northeast Extension is undergoing widening and lots of other work. But the part SOUTH of the turnpike, that cuts through Montgomery & Delaware County west of Philly does not have any major construction problems, just volume during rush hours.
