The corpus from 1975–1979 reveals a striking fork in how speculative writers imagined personal transportation's future: one branch soars into radical reinvention, the other stays stubbornly earthbound — and the earthbound branch turned out to be far more prophetic, though for reasons its authors couldn't quite see.

Gerard O'Neill's The High Frontier (1977) is the corpus's most elaborate transportation dreamer. His "commutersphere" and "magneplane" systems imagine personal mobility as a solved problem — energy-free inter-habitat travel, maglev transit running at 300 mph through vacuum, electric runabouts that navigate bicycle paths autonomously following buried magnetic wires. The technology is often sound (maglev exists; autonomous vehicle guidance exists), but the entire vision depends on a premise that never arrived: that humanity would build rotating space colonies by the early 21st century. O'Neill got the components right and the context catastrophically wrong. We have maglev trains — in Japan, not in vacuum cylinders orbiting at L5.

Arthur C. Clarke's The View from Serendip (1977) makes the more interesting error. He correctly anticipated that telecommunications would reduce commuting pressure — "a future in which men do much less commuting, much more communicating" — and he was essentially describing remote work forty years before COVID normalized it. But his mechanism was wrong: he thought the city would die first, then commuting would follow. Instead, the city survived and even intensified, and it took a pandemic rather than a communications revolution to finally shift commuting patterns. Clarke saw the destination but misread the route.

Mark Adlard's Multiface (1975) contributes the sharpest ground-level vision. His future London runs on electric autos hired by credit card from automated terminals — essentially car-sharing with EVs. The vehicles are silent, fume-free, computer-coordinated. A character studies the "Autocomplex" map between city sectors with its ring roads, traffic circles, and radial connections, and finds it nearly incomprehensible. That detail lands differently in 2025: we built the electric cars and the app-based rental systems, but the road geometry remained exactly as labyrinthine and anxiety-inducing as Adlard's character found it. The infrastructure outlasted every prediction about it.

Joseph Weizenbaum's Computer Power and Human Reason (1976) offers the most uncomfortable retroactive clarity. He argued that the computer was used to automate automobile production lines so consumers could "choose from among millions of trivial options on their new cars" rather than to develop genuine alternatives to private car dependency. He proposed that mass transit could have been prioritized instead. From 2025, this reads less like a prediction and more like a diagnosis of a path-dependency that held: we have electric vehicles now, but they remain private vehicles, and the fundamental structure Weizenbaum critiqued — individual car ownership as the primary mode of personal transport in American cities — persists almost unchanged.

[O'Neill, The High Frontier, 1977] contributes the corpus's most technically detailed transportation imagination. His magneplane passages are genuinely prescient about maglev physics and autonomous vehicle guidance. What they reveal about the era's blind spot: the assumption that energy abundance and space colonization were imminent made transportation feel like an engineering problem already half-solved. The "commutersphere" isn't a fantasy vehicle — it's a bus, reimagined for a context that never materialized. O'Neill's transportation visions are essentially correct solutions to a problem set that didn't arrive on schedule.

[Weizenbaum, Computer Power and Human Reason, 1976] is doing the heaviest critical lifting. His argument that computers were deployed to entrench the private automobile rather than transcend it is the passage that reads most differently from 2025. Tesla's entire value proposition — a computer on wheels, customizable to an extreme degree — is almost a literal fulfillment of what Weizenbaum was warning against. The "astronomical variety of cars that differ only trivially" has arrived, and it's software-defined.

[Adlard, Multiface, 1975] provides the most accurate surface-level vision: electric, silent, hired by card, computer-coordinated, operating within a complex road network. His future London's auto-hire system is Zipcar or Uber, essentially. What Adlard couldn't see was that the social texture of car use — status signaling, the hierarchy of vehicle quality, the intimidation of complex road systems — would survive the electrification and computerization he correctly imagined.

[Clarke, The View from Serendip, 1977] contributes two relevant threads: the telecommunications-reduces-commuting prediction (correct in mechanism, delayed and incomplete in effect), and a brief passage about autonomous homes that could be moved by sky crane — the most eccentric transportation vision in the corpus, which has not arrived. His observation that road and rail systems involve "such gigantic investments of capital, material, and labour that, even with the strongest incentives, it requires decades to make substantial changes" is the most durable single insight in the corpus on this subject.

The arc across these texts runs from transcendence to entrenchment. O'Neill imagines transportation problems dissolved by a change of context — move humanity to space and the whole problem reformulates. Clarke imagines them dissolved by a change of behavior — communicate instead of commute. Both are transcendence narratives. Adlard and Weizenbaum, writing from a more skeptical register, imagine transportation modified rather than transcended: the same basic structure (private vehicle, complex road network, status hierarchy) with electric motors and computer assistance layered on top.

The skeptics were right. What the 1975–1979 corpus collectively failed to anticipate was the extraordinary stickiness of existing transportation infrastructure — not just physically, as Clarke noted, but culturally and economically. The private automobile survived electrification, survived the communications revolution, survived the pandemic's remote-work experiment. What changed by 2025 was the powertrain and the software; what didn't change was the fundamental relationship between person, vehicle, and city. Weizenbaum, the most pessimistic voice in the corpus, produced the most accurate prediction: the computer would be used to elaborate and entrench the automobile, not to replace it.

This corpus is almost entirely male, almost entirely Western (British and American), and almost entirely focused on technological capacity rather than political economy. Nobody in these passages asks who owns the infrastructure — a question that turns out to be central to how transportation actually evolved. Ride-sharing, autonomous vehicle development, and EV adoption have been shaped at least as much by venture capital dynamics, regulatory capture, and platform monopoly as by any engineering breakthrough. Weizenbaum gestures toward political economy but doesn't develop it into a transportation-specific analysis.

The corpus also has no voices from the Global South, where the most dramatic transportation transformations of the next fifty years are actually occurring — motorcycle-taxi platforms, informal transit networks, leapfrog electrification. O'Neill's space colony commuters and Adlard's London auto-hire users are imagining futures for people who already have infrastructure. The transformation of mobility for the two billion people who don't is entirely outside this telescope's frame.