According to a 2014 study by the Nationwide Building Society in the U.K., home buyers will pay a ten percent premium for a property that is close to a tube (subway), railway, or tram station. In London, that meant there was a 42,000 pound premium- in US dollars, that is more than $68,000. A secondary factor was the length of time it took to commute into central London. Not all proximate stations are created equal, in other words.
The study was conducted in London, Manchester, and Glasgow. The  home premiums were significantly lower in Manchester and Glasgow, but still underscore that there is a H+T balance (somewhere) and that it is significant to “mind the gap”.