The Signal
The 1975–1979 corpus reveals a striking fork in the road when it comes to personal transportation in 2025: one branch leads off-planet entirely, and the other stays stubbornly, frustratingly earthbound. Neither branch anticipated where we actually ended up.
O'Neill's The High Frontier is the most elaborate transportation vision in the corpus, and it's worth sitting with its specific mechanics: the "commutersphere," a passenger sphere with no engine, no crew, no fuel cost, released at the precise moment in a habitat's rotation cycle to coast across space on pure angular momentum. "Such transportation should be quite inexpensive, because it will require no energy. That sounds vaguely disquieting, rather too much like perpetual motion, but in fact the statement is true." The detail is extraordinary — O'Neill works out the physics of gravity restoration on arrival, the half-roll during transit, the magneplane connections to valley stations. What's revealing is that he imagined the hard problem of personal transportation as fundamentally solved once you escape the atmosphere. The difficulty wasn't the vehicle; it was the medium. Petroleum, aerodynamic drag, sonic booms, the "complicated structure to take atmospheric buffetings" — these were the enemy, and space was the solution.
Adlard's Multiface takes the opposite approach and lands much closer to 2025 reality, though for reasons that feel almost accidental. His future London runs on electric autos hired by credit card from terminal kiosks, stratified by cost across a tiered class system — the cheapest a doorless black box, the most expensive a silver shape "like a spaceship on wheels" costing two months of increments for a one-way sector trip. The auto in passage 9 navigates autonomously through a tunnel under the Thames, its gas turbines running "without vibration and in total silence" after 200,000 kilometers of maintenance-free operation, while its driver contemplates the horror of the old world — "piston engines vomiting carbon monoxide" in queues for the coast. A green light blinks to indicate the auto will stop in ten kilometers unless new coordinates are punched in. This is, functionally, a description of a Tesla on Autopilot navigating the M25, complete with range anxiety expressed as a dashboard warning. Adlard got the texture of autonomous electric vehicles right — the quietness, the class stratification of access, the navigation handoff between automation and human — while missing that the gas turbine would never be the engine of choice.
Weizenbaum's critique, written from outside fiction entirely, cuts the sharpest. He identifies the computer's role in personal transportation not as liberation but as lock-in: "the computer was used to automate the flow of parts to automobile production lines so that people could choose from among millions of trivial options on their new cars." He saw the fork that was actually taken. The automobile's "cultivated and finally addictive hunger" wasn't disrupted by mass transit or rail — the computer made the car more entrenched, more customizable, more inescapable. In 2025, that observation reads as prophecy. The private automobile remains the dominant mode of personal transportation in the United States, now with millions of software options layered over essentially the same physical form.
Clarke's The View from Serendip offers a different angle: the city will die because communication will replace transportation. "Men do much less commuting, much more communicating." The prediction is half-right. Remote work did surge — but cities didn't die. The car didn't become obsolete. What Clarke couldn't see was that the communications revolution and the transportation system would coexist in an uneasy, mutually reinforcing sprawl: you could work from home three days a week, which meant you could afford to live further out, which meant you needed a car more than ever.
The Sources
[O'Neill, The High Frontier, 1977] does the most imaginative heavy lifting, but it's heavy lifting in the wrong direction. His transportation vision is inseparable from his habitat vision — the commutersphere and magneplane only make sense inside a constructed space colony. He's not imagining 2025 Earth; he's imagining a parallel 2025 that branched off when humanity went to L5. What he contributes to the observation is the logic of his era's optimism: if you're going to space anyway, why not solve transportation there first? The passages reveal how completely the 1970s space-colony movement had displaced the problem.
[Adlard, Multiface, 1975] is the corpus's most uncanny hit. The electric auto hired by credit card, navigating autonomously, stratified by price into a class system — this is the Uber/Tesla/autonomous vehicle complex rendered in fiction fifty years early. The detail of the "New Autocomplex" map, with its traffic circle and ring road that "frightened Will merely to look at," captures the psychological reality of driving infrastructure that hasn't changed: the M25 is still a source of existential dread. Adlard contributes texture and class-consciousness that O'Neill entirely lacks.
[Weizenbaum, Computer Power and Human Reason, 1976] is the sharpest diagnostic tool in the corpus, though it's nonfiction. His observation that computers entrenched the automobile rather than replacing it with something better is the single most accurate prediction about personal transportation in this entire set. He contributes the critical framework: the question isn't what technology could do but what social and economic forces chose to do with it.
[Clarke, The View from Serendip, 1977] contributes the communications-as-transportation-substitute thesis, which is the prediction that came closest to disrupting personal transport without actually doing so. His "comsole" anticipates video conferencing with remarkable precision, but his conclusion — that this would kill cities and reduce commuting — was only partially borne out, and in ways that paradoxically increased car dependency in suburban and exurban areas.
The Pattern
The 1975–1979 corpus splits along a fault line that maps almost perfectly onto class and scale. O'Neill imagines transportation as an engineering problem solved at civilizational scale — the solution is a new habitat with built-in infrastructure. Adlard imagines it as a consumer experience stratified by credit — the solution is a hired box that takes you where you point it, if you can afford the upgrade. These aren't just different predictions; they're different theories of what transportation is for. O'Neill's travelsphere is a commons. Adlard's auto is a commodity.
What's absent from the entire corpus is the prediction that actually came true: the private automobile, running on petroleum, would still be the dominant mode of personal transport in 2025, but it would have a software layer — navigation, ride-hailing, semi-autonomous driving — that made it feel transformed without actually being transformed. Weizenbaum got closest to seeing this, but even he framed it as a critique of what had happened rather than a prediction of what would continue. The authors of this era expected a rupture — space colonies, autonomous electrics, communications replacing commuting — and what arrived instead was continuity dressed in new software.
The Blind Spot
This corpus is almost entirely British and American, male, and focused on the Global North's transportation problems. It has nothing to say about the motorization of Asia — the explosion of motorcycle and scooter culture that would become the dominant form of personal transportation for hundreds of millions of people — or about the ways that informal transportation networks (minibuses, motorcycle taxis, shared jeepneys) would prove more adaptive than any planned system. The "personal transportation" being imagined here is always a sealed vehicle moving between controlled nodes. The chaotic, human-scaled, negotiated transportation of most of the world's cities in 2025 is entirely outside the frame.
The corpus also has no women authors, which shows in the transportation visions: the commuter is consistently male, the passenger occasionally female (Isabel in Multiface, guided to the auto she didn't choose). The question of who doesn't get to move freely — by gender, by class, by disability — never surfaces. O'Neill's commutersphere is "luxurious"; Adlard's auto is "intimate"; Clarke's comsole eliminates the need to move at all. None of them imagined transportation as a site of structural exclusion, which is precisely what it remains in 2025.