I think we might see a few of these projects built over the next 10 years..

• The MARC/Amtrak Upgrade plan similar to the 3.5 billion $ Amtrak/VRE upgrade in Virginia. Dedicated tracks and separate tracks for Passenger service along the Camden & Brunswick Lines
• The Baltimore Tunnel replacement for Amtrak , allowing for faster speeds and double the capacity
• Maryland Northeast Corridor Bridge Replacements , allowing for speeds up to 180mph with some curve straightening
• Yellow line extension to BWI Airport station
• Infill Stations on the MARC Penn line in Baltimore
• A switch to EMUs on the Penn Line and DMUs on the Brunswick/Camden Lines
• A Red Line LRT line
• Green Line Extension to Morgan State
• Charles Streetcar replacing the proposed Yellow line from the Harbor to Towson
• Under the Amtrak connects proposal , service to Harrisburg from DC via Baltimore