City authorities all over the world are finding that, for congestion charging schemes to work in shifting urban commuters out of their cars, there must be reliable alternative modes in place. “Notable schemes including Singapore ERP, London congestion charge, Stockholm congestion tax and HOT lanes in the US have proved that congestion charging is a necessary next step to encourage travellers to use public transport,” says Zeina Nazer, co-founder of Cities Forum (pictured). “Dubai RTA Salik toll was implemented in 2007, with Dubai Metro implemented in 2009.