Template:NYCS Platform Layout IRT Pelham Line/local/elevated with unused middle track/doc

Usage
Platform layout template for elevated three-track local stations on the IRT Pelham Line with the middle track not in service:
 * Castle Hill Avenue station
 * Zerega Avenue station
 * Westchester Square–East Tremont Avenue station
 * Middletown Road station
 * Buhre Avenue station