An Amtrak train departs Fredericksburg on a cool but sunny Wednesday morning.

A westbound Amtrak train passes under the signal bridge at Cove on a sunny November afternoon.

This westbound Amtrak passes through Cove Township on the old Pennsy Mainline on a beautiful late November afternoon.

Lucky 13, running southbound out of DC on a sunny October Sunday evening, pulls into Alexandria's Union Station to take on passengers. Overhead, a US Airways 737 is on final to Washington Reagan ... (more)

An Amtrak regional blasts south toward DC's Union Station, just 15 minutes down the line.

An Acela zooms south toward DC's Union Station on a sunny Friday afternoon.

Diesel under wire...a Genesis workhorse lugs a solo ExpressTrak reefer southbound on a beautiful late fall afternoon.

Bean Town Bound! This Acela Express blasts northward through the southern outskirts of Baltimore early on a Thursday evening.

A northbound regional blasts through Suburban Maryland on a cold Saturday morning.

Under a canopy of wires, this southbound Acela Express glides the final mile toward its destination, Washington's Union Station.

Northbound at high speed, autumn leaves swirling in the wake, along the Northeast Corridor between DC and Baltimore. Note that Track 3 is closed for maintenance.

Northbound Acela Express kicks up leaves as it blows through Odenton on a warm November afternoon.

Along the RF&P, a northbound Amtrak crosses the placid waters at the mouth of Neabsco Creek late in the afternoon. Beyond the bridge lies the Potomac River.

Southbound Amtrak has just crossed the Occoquan River, about 30 minutes south of Washington, DC.

Southbound Amtrak short hauler crosses the Potomac from DC into Virginia at about 1130.