The toll costs from Trenton, NJ, to Washington, D.C., can vary depending on the specific route taken and the time of travel. Generally, if you take the New Jersey Turnpike (I-95) and then the Baltimore-Washington Parkway, you can expect to pay around $15 to $20 in tolls. It's advisable to check current rates on the respective toll authority websites for the most accurate and up-to-date information.
AboIt 15$
There is an App called Tolls USA (on iTunes store) that calculates tolls anywhere in the USA between two addresses/points on the map.
Round trip $17 (as of Oct 2008).
about 30$ one way. Both way will cost about 50 - 60 $.
That can be done toll free.
$52 round trip through Staten Island
How much is the toll cost from Bethesda, Maryland to Burlington, VT?
4
The cost should be about $16.50 on I 95 until the end of DC. After washigton DC there isn't any tolls on I95 all the way down to the sunny state of FLORIDA. $5.50 on NJ turnpike,Delaware $7.00 & Maryland $4.00.
3
It's about $18.50 in tolls.
About $24 paid in April 2012 for one way journey from Chicago IL to DC.