When people think about major infrastructure projects, they often picture highways, bridges, rail systems, or towering buildings that define a skyline.
But some of the largest and most heavily used infrastructure systems are the ones many people overlook entirely.
At Colliers Engineering & Design, our civil/site and transportation professionals see it every day – parking lots quietly power nearly every place people live, work, shop, and gather. From healthcare campuses and commercial developments to downtown districts and community spaces, parking infrastructure shapes how people move and how communities function.
In sheer land coverage, daily use, and economic impact, parking lots may be among the largest infrastructure projects built across the country. In fact, according to analysis using satellite data and land-use mapping, surface parking lots alone account for about 26 % of the land in many U.S. downtown areas, and in some city cores that figure is even higher. As we celebrate Engineers Week, it’s worth taking a closer look at why these spaces matter far more than most realize.
The invisible backbone of daily life
Parking lots are often viewed as simple paved areas, but in reality, they are carefully engineered systems designed to perform under constant use and changing conditions.
Every parking facility must guide vehicles safely, accommodate pedestrians, manage stormwater, withstand heavy loads, remain accessible for all users, and increasingly support modern utilities such as site lighting and EV charging infrastructure – all while supporting the surrounding development. When these elements come together successfully, the experience feels effortless. When they don’t, the problems are immediate and evident.
Where engineering meets everyday experience
Good parking design doesn’t call attention to itself. It seamlessly keeps traffic moving, reduces congestion, and creates safer, more welcoming environments. It requires both technical precision and an understanding of human behavior.
Engineers consider how drivers naturally navigate space, how pedestrians move between destinations, and how traffic patterns change throughout the day and year. These insights shape layouts, circulation paths, and safety features that make developments easier to use and more efficient to operate.
Modern parking projects are also playing a growing role in environmental responsibility. Many incorporate stormwater treatment systems, sustainable materials, and design strategies that reduce runoff and heat buildup, helping protect surrounding ecosystems while improving long-term performance.
What was once treated as leftover space has become an important opportunity to build smarter infrastructure.
Parking as a catalyst for revitalization
As communities grow and land becomes more valuable, parking is increasingly viewed as a tool for redevelopment rather than just a necessity
One recent project in Bethlehem illustrates how thoughtfully designed parking can help drive revitalization. There, Colliers Engineering & Design partnered with the Bethlehem Parking Authority to modernize a key downtown parking facility. The Walnut Street Parking Garage project helped support local businesses, improve accessibility, and create new opportunities for residential and commercial growth while delivering a modern parking solution that fits into the city’s broader revitalization efforts.
Projects like this show how thoughtfully engineered parking can strengthen communities and unlock future development.
The infrastructure hiding in plain sight
Across the United States, parking infrastructure covers an enormous amount of land, often rivaling the footprint of major urban areas.
Nearly every commercial corridor, hospital campus, university, and downtown district depends on it. These spaces influence first impressions, shape daily experiences, and play a critical role in economic activity.
In many ways, parking facilities quietly compete with the scale and impact of the most visible infrastructure projects we build.
Engineering what keeps communities moving
At Colliers Engineering & Design, parking infrastructure is approached as a vital component of civil/site design and transportation planning. One that directly affects safety, functionality, and long-term community success.
By bringing together engineering expertise, thoughtful design, and a deep understanding of how people use space, our teams create parking solutions that support growth today while preparing for the needs of tomorrow.
Because when parking works well, everything around it works better!