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To reduce transportation emissions, make it realistic for people to ditch cars - SmartCitiesDive

By David Scorey


Building walkable communities with easy access to public transit is key to reducing our reliance on cars and achieving environmental goals, writes the CEO of Keolis North America.



Transportation makes up the largest share of U.S. carbon emissions, and expanding public transit will play an important role in decarbonizing the sector. Ambitious investments in public transit are needed to make transportation more modern, efficient and reliable. But while taking public transit is a more environmentally friendly option than driving, for many people driving isn’t a choice – it’s a necessity. We need to build communities that are walkable and have access to robust public transit so that it’s easy to drive less.


More and more cities are tackling this issue with transit-oriented development, or developing residential areas with convenient access to transit. In practice, this translates to making sure daily activities – from picking up groceries to dropping kids off at school – can be managed without needing to drive. This is a tall order for many today; according to the 2017 National Household Travel Survey, conducted by the Federal Highway Administration, the average American commute exceeds 10 miles. Supportive city zoning laws and urban development initiatives are a key, if underappreciated, part of how public transit will help us make progress toward our environmental goals.


Congestion – which has become a hallmark of America’s biggest cities – is bad for the environment, not to mention a burden for drivers in stop-and-go traffic and a danger to pedestrians trying to navigate cities not built to accommodate them. As such, walkability and bikeability will play a major role in this shift toward transit-oriented development. We’re already seeing experiments with this approach play out across the globe.


The COVID-19 pandemic has only accelerated this trend by demonstrating to cities the value of reducing car traffic, expanding bike lanes and sidewalks, and enabling pedestrian commerce to flourish. Ensuring pedestrian and cyclist access to mass transit stations amplifies emissions reduction benefits while also making cities more vibrant and potentially increasing quality of life.


And more cities in the U.S. are taking notice of how transit-oriented development can play a role. Just last month, Washington D.C.’s transit agency published a 10-year plan to accelerate transit-oriented development, aiming to produce 26,000 new housing units and 31 million square feet of new development over the next decade.


Transit-oriented development’s impact on land usage further reduces emissions and fosters greener cities. In the U.S., over 5% of urban land is covered with parking lots, and there are eight parking spots for every car. Developing communities with transit in mind reduces the need for parking lots and allows for the land to be used more productively, such as for community green space, small business storefronts, or affordable housing. Public transit also reduces the need for road expansions and never-ending road construction, which only induces demand, spurring a cycle of more cars on the road and more emissions.


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