"Find the best route to travel using public transportation without ever leaving the Google Search page. For example, if you're in New York and traveling from Fulton Street to Times Square, you can search [from columbus circle to times square by train] to find information about the next train that's leaving. You can also search for directions between cities, like [seattle to portland by train]," informs Google.
Click the Settings button to specify the date and time for your departure or arrival.
You can also append to your query "arriving by 5 pm" or "departing at 6 pm".