Please note the change in venue (Updated: Jan 17, 2015)
The colloquium will be held at the Glass Pavilion on the Homewood Campus at Johns Hopkins University.
Baltimore Penn Station serves Amtrak trains and Penn line of the Marc train. BoltBus has a drop off as well. The Homewood campus is very close to the train station and can be reached with a modest fee (~$10) by taxi. If arriving by taxi, it will be easiest to arrive at Mason Hall (3101 Wyman Park Drive, Baltimore, MD 21218).
Google maps can provide directions to campus. There are parking garages on south campus off of Wyman Park Drive (under Decker Quad on the map), as well as at the San Martin center on north campus. Parking is available for a modest fee.