Cities used to grow by accident. Historically, urban locations usually made pragmatic sense—chosen because they were defensible, situated on a hill or an island, placed near an extractable resource, or located at the confluence of transport routes. But what happened next was entirely ad hoc. The people who worked in the local fort, mines, port, or warehouses needed places to eat, sleep, and worship. Infrastructure threaded through the hustle and bustle—water, sewage, roads, trolleys, gas, and electricity—woven together in vast networks of improvisation. While history offers planned exceptions like Alexandria, Roman colonial towns, certain districts in major Chinese cities, and Haussmann’s Paris, the vast majority of urban development was built on happenstance, luck, and the layering of the new on top of the old.
At least, that is the way things worked for most of human history. But around the second decade of the 20th century, things changed. Cities started to happen on purpose. Beginning with New York City’s pioneering zoning laws in 1916, development began to occur by commission rather than omission. Laws and regulations dictated the shape of the architectural envelope. Functional decisions determined aesthetic outcomes—though not always for the best.
Today, a century after human beings first started putting their minds toward designing cities as a whole, urban design is entering a golden age. High-tech materials, sensor networks, new scientific insights, and better data are allowing architects, designers, and planners to work smarter and with unprecedented precision. Modern cities are becoming more environmentally sound, more engaging, and more visually striking. This evolution comes just in time, as the majority of the human population now lives in urban environments rather than rural ones.
Examining global projects ranging from smart streetlights and sacred urban spaces in flux to masterful museums and dedicated bicycle infrastructure reveals a shifting paradigm. The cities of tomorrow might still assemble themselves haltingly, but done right, the process is no longer accidental. A city shouldn’t just happen anymore; every block, building, and brick represents innumerable deliberate decisions.
Los Angeles Goes LED and Gets Connected
In Southern California, Los Angeles is in the process of retrofitting 4,500 miles of orange-yellow sodium-vapor streetlights with a moonlight-hued matrix of energy-efficient light-emitting diodes. While the roads will appear brighter, they will also become deeply interconnected. Every lamp will link wirelessly to the Bureau of Street Lighting, transmitting real-time operational data to headquarters regarding whether it is functioning, deactivated, or broken.
Future iterations aim to introduce lights that dynamically respond to their immediate surroundings. These smart lamps might blink to signal an approaching police car or ambulance, or brighten to safely guide pedestrians leaving a major sporting event. While other cities worldwide deploy LEDs primarily to save money or add splashes of color, Los Angeles is building a comprehensive network designed to convey information about the entire urban ecosystem.
An Airport Within an Airport for Elite Fliers
More than 70 million people passed through Los Angeles International Airport in 2014, navigating a jet-lagged gauntlet of rolling luggage and travel pillows. In response, LAX undertook an $8-billion-plus overhaul touching everything from concession areas to moving walkways. Delta Air Lines contributed $229 million to completely revamp its Terminal 5. The centerpiece of this renovation is Delta One, an exclusive lounge environment functioning as an airport within an airport, catering to celebrities and high-net-worth travelers.
Upon arrival at Terminal 5, a curbside attendant verifies passenger identities behind a velvet rope. Once checked in, guests retire to a private lounge space before being escorted by Delta staff via a private elevator and corridor directly to the front of a priority security checkpoint. Returning travelers can utilize an express exit service, being chaperoned directly to the tarmac where a hybrid Porsche transports them across the airfield to a waiting vehicle on Century Boulevard.
Los Angeles Combats Drought with Native Landscapes
The towering palm trees along Hollywood Boulevard are undeniably iconic, but they are not native to Los Angeles. As California battles persistent drought, landscape architects are replacing imported flora and water-intensive turf with native, drought-resistant plants. This emerging aesthetic, termed "California Dry," emphasizes creative textures and natural shapes. Traditional green lawns are being phased out in favor of decomposed granite, mulch, rocky pathways, and bridges, while architectural succulents like foxtail agave and echeveria provide striking structural rows.
A Mobile Opera Cruises Downtown LA
For a truly unconventional performance of Hopscotch, an opera staged across 24 limousines and SUVs traversing downtown Los Angeles, audiences sit knee-to-knee with musicians and singers. During the multi-week run, vehicles follow three distinct routes tracking a narrative of lost love. Actors and dancers equipped with wireless microphones perform on sidewalks and passing cars, seamlessly blending art into the everyday choreography of city life. With audiences capped at 96 people per performance, attendees alternate between riding in vehicles and entering public spaces to experience individual chapters of a complex, sprawling storyline.
An Evolving Museum Spirals Between Past and Present in Shanghai
Shanghai has experienced staggering vertical growth, characterized by ranks of bristling skyscrapers. Amidst this architectural boom stands the new Shanghai Natural History Museum, located in a park near the Pudong financial district. Designed by Perkins+Will, the building spirals downward into the earth, evoking an excavation of the city’s pre-urban history. A central courtyard inspired by the classical water gardens of Suzhou pays homage to ancient Chinese appreciation for natural beauty, while a honeycombed glass wall reminiscent of plant cell structures floods the interior with natural light.
Architect Ralph Johnson drew inspiration for the structure’s nautilus shell shape not only from nature, but also from the practical need for crowd control. To manage heavy visitor traffic, descending interior ramps guide crowds on a chronological tour of life on Earth, featuring roughly 11,000 specimens, including a towering Mamenchisaurus skeleton. Sustainable green climate and water systems, including the cooling courtyard pool, ensure the museum balances futuristic ambition with ecological mindfulness.
Medellín’s Cable Cars and Library-Parks Unify a Fractured City
Nestled in a high Andean valley, Medellín historically forced many of its poorest residents to settle in precarious comunas along steep slopes. During the 1990s, drug cartels and guerrilla factions controlled these narrow streets, isolating the hillside populations. When the violence subsided, residents faced a severe geographic challenge: commuting downtown was remarkably difficult.
To bridge this divide, local leaders introduced an innovative urban transit solution: the Metrocable. Opening its first line in 2004, the aerial gondola system allowed residents to bypass perilous hillsides and connect directly to the municipal metro network. By granting low-income citizens reliable access to jobs and municipal opportunities, the Metrocable fostered cross-class interaction and dramatically reduced crime in connected neighborhoods.
Subsequent municipal leaders expanded on this foundation by introducing architectural investments in marginalized areas. Five striking "library-parks," designed by architects like Giancarlo Mazzanti and championed by urban projects director Alejandro Echeverri, brought safe public green spaces, cultural events, and renewed civic dignity to vulnerable communities. These infrastructure projects were paired with grassroots efforts, such as community-led mural projects and historical walking tours in areas like Comuna 13, illustrating how comprehensive, community-integrated planning can revitalize a fractured city.
The Hovenring Keeps Cyclists Above Eindhoven’s Traffic
Eindhoven transitioned from a sleepy provincial town into a vibrant technology hub following the 1891 establishment of Philips’ lightbulb manufacturing. As commuting traffic increased from sprawling suburbs, the city’s busy intersections became increasingly hazardous for cyclists. Rather than treating bicycle lanes as an afterthought, Eindhoven commissioned design firm ipv Delft to build a dedicated, grade-separated solution.
Completed in 2012, the $8 million Hovenring features a 1,000-ton steel deck suspended by 24 steel cables from a central pylon. Illuminated by dramatic LED lighting panels, the circular floating deck allows thousands of daily commuters to pedal smoothly above the stop-and-go traffic below, establishing a clear statement about the city’s modern transportation priorities.
Engineering Infrastructure for Millions of Pilgrims in Mecca
For five days every year, the population of Saudi Arabia surges by approximately 3 million people during the annual hajj pilgrimage. To handle this immense influx safely, the Saudi government has continually enlisted world-class architects to upgrade Mecca’s infrastructure while respecting Islamic traditions.
At King Abdulaziz International Airport, the 2.8-million-square-foot Hajj Terminal utilizes twin Teflon-coated fiberglass roofs inspired by traditional Bedouin tents. Natural ventilation keeps the open-air waiting areas comfortable despite searing external temperatures. Beneath the surface of the holy site, a massive pneumatic waste management network routes 600 tons of daily trash through underground tubes at 40 miles per hour to a processing station over a mile away.
To accommodate swelling crowds at the Masjid al-Haram, architects from Gensler designed multi-tiered, eight-sided platforms surrounding the sacred Kaaba, doubling the capacity of the courtyard while preserving sightlines and traffic flow. In the nearby Mina Valley, a sprawling encampment of more than 100,000 air-conditioned, fireproof fiberglass tents provides temporary housing, supported by dedicated medical infrastructure. Additionally, the Jamarat Bridge was re-engineered into a multi-level structure to streamline the traditional stoning ritual and prevent dangerous bottlenecks.
Taming Nairobi’s Minibus Network With Orderly Maps
Transportation in Nairobi relies heavily on privately operated minibuses known as matatus. Known for vibrant interior decorations and loud music, the informal network previously lacked standardized scheduling or route maps, making navigation a challenge for daily commuters.
A research and design initiative called Digital Matatus deployed local university students with smartphones to track GPS data across more than 100 routes and stops. By publishing a subway-style transit map and integrating the data into Google Maps, the project brought formal visibility to the informal network, greatly enhancing safety and reliability for local riders, particularly women traveling after dark.
Coworking Spaces Redefine Professional Environments in San Francisco
The modern workplace in cities like San Francisco increasingly extends beyond traditional cubicles and corporate leases. Companies like WeWork have transformed urban commercial real estate by offering flexible, full-service coworking environments tailored to startups and remote teams. By prioritizing natural light, open communal areas, eclectic interior design, and administrative convenience, these collaborative spaces have cultivated an environment that fosters networking, creative spontaneity, and operational flexibility for thousands of modern workers.
Dubai’s Turbine Interchange Solves Highway Congestion
Emirates Road in Dubai previously suffered from severe traffic bottlenecks caused by conventional roundabouts that required high-speed vehicles to come to a complete stop before merging. To eliminate these delays, municipal officials replaced a troublesome intersection with a modern turbine interchange.
Devised in the United Kingdom during the 1960s, the turbine configuration allows drivers approaching from four directions to execute turns without slowing down or weaving through conflicting traffic streams. Although turbine interchanges require substantial spatial footprints, Dubai’s abundant land availability made the design practical. Opened in 2008, the nearly third-of-a-mile-wide interchange features 11 bridges spanning 1.5 miles, delivering a high-speed, high-capacity traffic solution that combines engineering efficiency with clean geometric design.
