New York - Grand Street Station
The APT-BF system was installed at a tangent NYCTA track. To speed up the installation process, the fastener was delivered as a single unit and was preassembled on a steel plate that in its turn was bolted to the existing wooden sleepers.
After installation, comparison of ground borne vibration levels between standard NYCTA track and track with the APT-BF fastener at Grand Street Station learned that vibration levels decreased with more that 15 dB.
Read the article about the preloaded APT-BF system in NY from the Interface Journal.