Together with partner agencies and stakeholders, MAG is looking at ways to improve and increase transportation options. The MAG region has experienced significant growth in size and population over the past few decades – encompassing approximately 2.1 million people in Maricopa County in 2000 and growing to include over 4.8 million people and expanding into northern Pinal County by 2020. As seen in other areas of the country, rapid population growth can cause significant strain on the regional transportation infrastructure, leading to worsening traffic congestion and air quality.