I grew up in New Jersey, the most densely populated state. And I lived in Los Angeles, where the 405 is one of the most congested arteries in the country (giving rise to the term road rage, I believe). But, for my money, the worst road in the country is I-76, known as the Schuylkill Expressway. As Will Bunch recently discovered, the Schuylkill can nail you at any time of day. I recently got caught in a traffic jam there at one in the morning. The road, which runs from Philly to King of Prussia along a narrow planed surface between a hillside and the Schuylkill River, just cannot be expanded to include more lanes.
When the terrorists finally plant that dirty bomb in the Liberty Bell, everyone is going to die on the Schuylkill Expressway.
What are your traffic/travel woes?