If you've been waying the pros and cons of Amtrak vs. airplane for your next trip through the Mid-Atlantic region, here's a point in favor of train travel: On March 3, the passenger rail service will begin offering lower fares on Acela Express trains running between Washington, DC and New York ($99 one-way down from $133) and New York and Boston ($79 one-way down from $93). The fares will be available through June 26 and require a 14-day advance purchase.