The 1975–1979 corpus arrives at personal transportation from two irreconcilable directions, and the gap between them is the story. Gerard K. O'Neill imagines transportation as a solved problem — elegant, frictionless, essentially free — while Weizenbaum looks at the same automobile-saturated landscape and sees a catastrophic wrong turn that computers helped entrench rather than escape. Both are writing about 2025. Neither is quite right, but their wrongness is perfectly calibrated to their moment.

O'Neill's "commutersphere" and "magneplane" are the most elaborately imagined transportation futures in the corpus: magnetically levitated vehicles in vacuum tubes, engineless spheres coasting between space habitats on pure orbital mechanics, electric runabouts that navigate bicycle paths by following buried magnetic wires. What's striking is how confidently he assumes the infrastructure problem is solvable. The energy is free (solar), the guidance is automated, the vehicles require no crew. He even gets the cost logic right — no fuel, no engines, simplified structure — and arrives at a figure of one-fifth the per-passenger-mile cost of a 1970s jetliner. In 2025, that's approximately what a budget airline charges. He was correct for entirely the wrong reasons: we got cheap air travel through deregulation and hub-spoke efficiency, not through magnetically accelerated spheres.

Weizenbaum's passage is the sharpest counterpoint in the corpus. Writing from the same mid-1970s moment, he identifies the automobile not as a transportation technology but as an addiction — "cultivated and finally addictive hunger for private automobiles" — and names the specific failure: computers were used to automate production lines delivering millions of trivially differentiated models rather than to build genuine alternatives. In 2025, this reads as prophecy. The American private automobile is not only still dominant; it has grown larger, heavier, and more computationally complex, while genuine mass transit alternatives remain politically contested. Weizenbaum saw the lock-in coming. He just couldn't see that the lock-in would survive fifty more years of knowing better.

Mark Adlard's Multiface occupies the middle ground, and it's the most textured portrait of all. His near-future London features electric autos with simple dashboards, hired by credit card from terminals, recharged at Autoterminuses — a system that maps almost exactly onto today's car-share and EV infrastructure. But Adlard embeds this in a class system: the cheapest hire is a "rectangular black box with a wheel at each corner and open spaces where you would have expected doors," while the top tier costs two months' increments for a one-way trip. The New Autocomplex map, with its spider-island roundabout and concentric ring roads, terrifies his working-class protagonist. In 2025, the terror is recognizable — we just call it the interchange.

[O'Neill, The High Frontier, 1977] does the heaviest lifting on the utopian side. Three passages work together: the magneplane system (maglev in vacuum, computer-controlled, operating on a few minutes' frequency without timetables), the commutersphere (engineless, crewless, costs nothing to operate after first investment), and the travelsphere for long-distance colonial transit. O'Neill's key contribution is the assumption that the infrastructure problem is the only problem — once you build the habitat and the guideway, transportation becomes essentially free. This is the dream that animates every hyperloop pitch deck in 2025. The technology keeps being announced; the infrastructure never gets built.

[Weizenbaum, Computer Power and Human Reason, 1976] contributes the structural critique. His argument isn't that cars are bad — it's that computers were deployed to optimize the existing system rather than question whether the system was right. The automobile production line got more efficient; the alternative of genuine mass transit got foreclosed. In 2025, this reads as a precise description of how AI is being applied to transportation: optimizing routing for individual vehicles, not redesigning the system. Weizenbaum gets the mechanism right even if he couldn't name the specific technologies.

[Adlard, Multiface, 1975] contributes texture that the other two lack: the phenomenology of using the system, not just its engineering or politics. The credit-card scanner, the alphanumeric gate, the tiered vehicle options from utilitarian box to gleaming spaceship-on-wheels — this is recognizably the UX of car-sharing in 2025. Adlard also captures something O'Neill misses entirely: that even in a rationalized, electric, computerized transportation system, the anxiety of navigation persists. The map of the Autocomplex is still incomprehensible. The interchange is still frightening.

[Clarke, The View from Serendip, 1977] is peripheral to transportation specifically but frames the larger context. Clarke predicts that better communications will reduce the need for commuting — "men will do much less commuting, much more communicating" — and that cities will begin to die as a result. In 2025, post-pandemic remote work has partially validated this, but the city-death he predicted hasn't materialized. What has happened is more complicated: the commute has become optional for some and intensified for others, cleaving along class lines in ways Clarke didn't model.

The arc across this five-year window runs from infrastructure utopianism (O'Neill) through structural critique (Weizenbaum) to lived texture (Adlard), and that sequence is itself revealing. The authors who imagine transportation most elaborately — O'Neill — are the ones most insulated from its daily friction. The author who critiques it most precisely — Weizenbaum — is the one least interested in what replaces it. Adlard, working in fiction rather than nonfiction, is the one who actually puts a character inside the system and lets the anxiety register.

What none of them anticipate is the specific form that 2025 transportation anxiety takes: not the engineering problem of building better vehicles, not the political problem of choosing mass transit over cars, but the attention economy problem of being inside a vehicle that is also a screen. The autonomous or semi-autonomous car of 2025 is primarily a device for consuming content while moving. O'Neill imagined the travelsphere as luxuriously comfortable; he didn't imagine that the passengers would spend the journey staring at a phone. The transportation problem got partially solved; the problem it solved turned out to be the wrong one.

This slice of the corpus is almost entirely male, almost entirely Anglophone, and almost entirely concerned with the Global North's transportation problems. O'Neill's space-habitat commuters are imagined as people who have already solved the problem of getting to space; the question of who pays for that ticket, and who is excluded, is not asked. Weizenbaum's "people" who developed an addictive hunger for private automobiles are implicitly American suburbanites; the urban poor who never had the automobile option aren't in his frame. Adlard's class system is at least visible, but his working-class protagonist Will is still navigating a system that exists — the question of populations for whom no system exists doesn't arise.

The corpus also has no Southern Hemisphere voices, no perspective from cities where personal transportation in 2025 looks like motorcycle taxis, minibuses, and rickshaws rather than electric cars and hyperloop pitches. The 1975–1979 window is also pre-oil-shock-recovery — these texts are written in the immediate aftermath of 1973, when the petroleum dependence of the automobile seemed like it might force change. It didn't, and the corpus can't see why not: the political economy of oil, highway lobbying, and suburban real estate that locked in car dependence is largely outside the frame of both the utopians and the critics.