This is more of a general question than a query about any specific model of arcology, but to make the question easier, let’s assume the arcology is either domed or covered by some sort pyramid made from selectively permeable solar panels, has an internal land area of about 8-10 square kilometers, and incorporates a mixture of smaller megastructures like large residential towers or farms alongside smaller buildings you can walk between via skyways. It houses a few million people, and while any location within the arcology is theoretically only a short walk away, traffic congestion in choke points and just the general need for convenience and efficiency demands a rapid mass transit system.
How would you do this?
Ideally I’m looking for practical solutions above all else, but I’m not above indulging in rule of cool (after all I’m intending for whatever transit system I end up using to be plagued by thrillseekers and its own version of punk biker gangs). One idea I’ve heard that overlaps nicely with an idea I had myself are pods that accelerate along predetermined tracks. The general idea was for the pods to be smaller, car-sized affairs, but I’m thinking more like a monorail system or cable cars that connect some or all of the more distant buildings to each other. To borrow an idea from Alistair Reynold’s Chasm City novel, perhaps the cable cars are all attached to a giant, web-like network of cables and they “crawl” along them using robotic arms like a spider, allowing them to freely change course by grabbing different cables and plot the most efficient route from one place to another using some city-wide traffic AI. Would this be safe and practical enough to pass muster, or is this too much rule of cool?