Complex sentence: The option tire rule was adopted by the IRL for 2009, and the standing starts for selected road and street course races for 2013-2014 but abandoned from 2015 on due to safety concerns.
Split into simpler sentences: The option tire rule was adopted by the IRL for 2009, as well as standing starts for selected road and street course races in 2013 and 2014. Standing starts were abandoned from 2015 on due to safety concerns.