One line that I think should be in Train Sim World is the 7 train in New York City. Going from 34th St-Hudson Yards in Manhattan to Flushing-Main St in Queens. You got a mix of local, express and super-express train services throughout 22 stations. Most of the line is on an elevated train with some nice visuals from Queensboro Plaza onward towards Flushing. Subway part extending within the heart of Manhattan. Plus this route would have plenty of services across an extensive timetable. This route is quintessential as a Rush Hour service with morning and evening rush services into and out of the city respectively. The rolling stock would include the current R188s with their 11-car trains with the possibility of including the famed R62A trains with the big purple 7 insignia in the front or even better the famous Redbird R33s or R36s cars that ran in the mid to late 20th Century. The area throughout Queens provides some good scenery and as well towards Citi Field and the Billie Jean King Tennis Complex. A subway line in the biggest city in the United States would definitely be a great addition to TSW in my opinion.