Complex sentence: The M60 became an SBS route on May 25,2014, and the route had been planned to be extended to LaGuardia Airport under the LaGuardia Alternatives Analysis; however, the Bx41 extension has not been implemented due to a lack of funding.
Split into simpler sentences: The M60 became an SBS route on May 25,2014, and the route had been planned to be extended to LaGuardia Airport under the LaGuardia Alternatives Analysis. However, the Bx41 extension has yet to be implemented due to a lack of funding.