Lawyers Hill Road in Relay Maryland has a turn that provides great views of southbound trains on the Thomas Viaduct. The Thomas Viaduct carries the CSX Capital subdivision between Baltimore and Washington DC.
For the best lighting, spring and fall are your best bets. Summer and winter will put the sun at odd angles, although in winter, a small 1 hour or so window exists early in the morning between approx 7 and 8 am.
Location: Relay MD. GPS Coordinates: 39°13’12.2″N 76°42’48.4″W
Safety Notice: Lawyers Hill Road is an active road. It is not recommended to park a car in the turnout. This may attract the attention of the police. Consider hiking or using a bicycle in combination with a scanner.