The ongoing process of development results in the generation of more traffic into and out of the centre. This means that Rotterdam must be particularly alert to traffic and transportation issues. The problem of accessibility demands innovative approaches and solutions in order to ensure that current and future citizens are able to live in a healthy, safe and pleasant environment. Within the TELLUS project (Transport and Environment Alliance for Urban Sustainability), the city focused on reducing congestion, CO2 emissions and energy use, car usage, air and noise pollution. It also promoted the use of public transport and bicycles.