One key to success will be better and fairer enforcement, to keep cars out of bus lanes, said Kyle Whitehead, spokesman for the Active Transportation Alliance, an advocacy group. The Loop Link lanes are often invaded by cars. The Alliance supports a change in state law that will allow photo enforcement, to ticket people blocking the bus lane. The Lightfoot Administration is currently assessing the most effective methods for bus lane enforcement, said spokeswoman Hali Levandoski.