IntroductionTransport today constitutes the lifeline of any country. No matter how advanced a country may be, it cannot maintain its growth rate without an efficient and comprehensive transportation network. This may be an air transport network, a river transport network or a rail transport network. All modes of transportation have their own benefits and cost factors. This article will focus on rail transportation in the Northeast region of the United States. In the United States, primary rail transportation involves the shipping of goods from one location to another. Passenger service, once an important and vital part of the passenger transportation network, now plays a limited role in transportation (Hilton, 1980). This trend is surprising compared to other countries, where passenger transport by rail is one of the most important. crucial aspect of their transportation framework. One of the main reasons for this trend could be changing economic needs and the rapid rise of other modes of transportation like air transport, road transport, etc. Amtrak is the only intercity passenger railroad in the continental United States. Although the commuter rail system exists in several metropolitan areas, these systems are not efficiently interconnected, making it unusable for travel across the country. Among these circumstances, there is still a region that boasts of superior and efficient passenger transportation. This region is known as the Northeast Corridor of the United States, which is an exception to the overall rail transportation system in the United States. The Northeast Corridor primarily connects Washington, New York, and Boston, with major branches in Connecticut and Massachusetts. Therefore, the North East Corridor (NEC) is ...... middle of document ...... list of regions where maximum population lives near the transit. This can be confirmed by the fact that more than 7 million people live within the 25 mile area of ​​New York City, but more than 7 million people live and 3 million people work within a radius of a half to a mile from the rail transit station. In cities like Boston, Washington, DC, and Philadelphia, 20 to 35 percent of the total population lives or works near rail transportation systems. The megacities of the northeastern region of the country concentrate the greatest ridership of commuter trains and most of the population and jobs are located within a 3 km radius of commuter rail stations (Loukaitou-Sideris, 2013). The number of passengers using this commuter rail service can be understood by the fact that in 2009, these systems collectively carried more than 300 million passengers, or almost 75 percent of the country's total commuter rail volume...