If dinosaurs had never gone extinct, what might a modern city look like?

Speculating on a world where non-avian dinosaurs remained the dominant terrestrial vertebrates is a favorite exercise for paleontologists and futurists alike. Because we are dealing with a "what if" scenario, there is no single answer, but we can imagine a city designed to coexist with large, mobile, and highly specialized reptilian neighbors.

Here is how a city in such a world might look:

1. Verticality and "Ground Clearance"

In a world with massive herbivores like sauropods or agile predators, cities would likely be built with ground-level safety in mind. Streets might be elevated via massive steel or concrete stilts, allowing large animals to pass beneath the pedestrian or transit layers without causing traffic accidents. Ground-level spaces would be rugged, fenced, or designed as "dino-proof" corridors.

2. Specialized Urban Architecture

• Armored Infrastructure: Public structures would need to be built with high-impact resistance. Walls might be thicker, and ground-floor glass would likely be replaced with polycarbonate or heavy-duty grating to prevent accidental damage from roaming wildlife.
• "Dino-Walks" and Corridors: Urban planning would likely incorporate dedicated migratory paths. Rather than trying to keep dinosaurs out of the city, planners might designate "green highways" that run through the city center, allowing herds to move through without interfering with human business.

3. Traffic and Transit

• The End of the Personal Car: Cars would be dangerous liabilities in a city shared with animals that could weigh several tons. Modern cities might instead rely on hyper-efficient, elevated rail systems or suspension-based cable cars that stay well above the reach of browsing herbivores.
• Buffer Zones: Instead of sprawling suburbs, cities might be compact "hubs" surrounded by vast, strictly regulated wilderness zones. The boundary between a city and the "wild" would be stark, likely marked by heavy, electrified, or sensor-based barrier systems.

4. Coexistence and Management

• Sanitation: Dealing with the waste of a multi-ton creature would be a major municipal challenge. Cities would likely have specialized "mega-fauna management" departments responsible for cleaning, pest control, and diverting herds away from residential districts.
• Technology: We might see the use of low-frequency sound emitters or pheromone-based repellents to encourage dinosaurs to avoid high-density human areas, functioning much like modern-day traffic lights for large animals.

5. Cultural Shift

The human psyche would be fundamentally different. In our world, we often view ourselves as separate from nature. In a dinosaur-dominated world, we would likely possess a deep, ingrained respect for the "dominance" of nature. Our culture, religion, and daily routines would revolve around the presence of these animals—much like people living in regions with heavy bear or elephant activity, but on a city-wide scale.

Ultimately, these cities would look more like "fortress gardens"—dense, technologically advanced human enclosures integrated into a vast, untamed landscape. It would be a world where the line between "city" and "jungle" is permanently blurred.