Traveling from Baltimore, Maryland to Brooklyn, New York will take you on roads like 83 North, 95 North, the New Jersey Turnpike and many local roads in both areas. The New Jersey Turnpike in particular charges tolls based on how long you've been traveling. When you get into the New York City area you will also be charged tolls depending on which route you take. For example, the Lincoln Tunnel or one of the bridges in the city charge a toll. You can estimate how much your trip will cost using the Internet.
Plan out your trip ahead of time using a service like Google Maps or MapQuest to find out exactly what roads you will be taking. The New Jersey Turnpike is unavoidable if you're traveling from Baltimore to Brooklyn, but when you get into the city itself you have some options when it comes to what bridges you can take, or if you'd rather take the tunnel.
Go to the New Jersey Turnpike website and use the toll calculator to find out the current toll amount to travel from one end of the turnpike to New York City. Write this number down on a piece of paper.
Visit the MTA Bridges and Tunnels Crossing Charges website and find out the current dollar amount of the toll you will pay for the bridge or tunnel you will be taking on your trip. Refer to your directions to find out which is the recommended route. Write this number down on a piece of paper.
Add up the dollar amounts for the tolls you find to find the total amount of money you need to take with you in cash to travel from Baltimore, Maryland to Brooklyn, New York.