Which year did PennDOT implement an enhanced emissions inspection program in Philadelphia and Pittsburgh?

The enhanced emissions inspection program in Philadelphia and Pittsburgh was implemented by PennDOT in 1997. This program was part of broader efforts to improve air quality and reduce vehicle emissions in urban areas with significant pollution concerns. The year 1997 marked a significant step in Pennsylvania's commitment to comply with federal air quality standards, particularly in regions that were identified as non-attainment areas due to high levels of pollutants.

By implementing this program, PennDOT aimed to increase the effectiveness of emissions testing, ensuring that vehicles meet stricter emission standards, thereby reducing harmful pollutants released into the atmosphere. This initiative played a key role in promoting cleaner air and improving public health in densely populated areas.