Kohat

Kohat matters because southern Khyber Pakhtunkhwa cannot move toward Peshawar efficiently along the Indus Highway corridor without it. The city sits 503 metres above sea level and Pakistan Bureau of Statistics-based 2023 reporting puts Kohat's urban population at about 235,880 residents, far above the older counts still copied across many databases. Standard summaries describe a cantonment town in Khyber Pakhtunkhwa. The more useful fact is that Kohat functions as a valve: a city where military selection, extractive industry, and tunnel traffic all pile onto the same corridor between Peshawar and the south.

The best evidence is what happens when the route breaks. The 1.89-kilometre Kohat Tunnel, opened in 2003 under the Kohat Pass, carries the N-55 Indus Highway through the Khigana Mountains. During a 2024 closure, Dawn reported that thousands of commuters were forced onto the old 22-kilometre hilly road and that one transporter needed at least four hours to cross it. When the tunnel reopened, UrduPoint described the route as a vital link between the southern districts, Peshawar, and Karachi. That is not just a traffic story. It is a reminder that Kohat sits on a chokepoint whose failure immediately drags trade, passenger movement, and state logistics into slower and riskier terrain.

The city also concentrates institutions that keep that corridor sticky. ISSB's headquarters are in Kohat Cantonment, making the city a gatekeeper for officer selection across Pakistan's armed forces. The Khyber Pakhtunkhwa Board of Investment and Trade says the wider Kohat district combines mining, hydrocarbon extraction, agriculture, and manufacturing, with an estimated 780 million tons of limestone reserves plus existing cement, textiles, arms, and ammunition production. That district base matters because Kohat is the service and administrative node sitting on top of it, collecting freight, staffing, repair, and security work instead of watching those flows pass elsewhere.

The biological parallel is an ant colony. Ant colonies move food, workers, and warnings along dense but narrow trails; block one key trail and the whole colony slows while traffic is forced into messy rerouting. Kohat behaves similarly. Path dependence explains why the old pass, cantonment, and highway alignment still structure the city. Network effects explain why military services, freight, and extractive business keep clustering there. Phase transitions explain the brittle part: close one tunnel and an ordinary transport day turns into a long mountain bottleneck almost immediately.