The screen on the dashboard knew the way home before I did. We were coming back from dinner, a left turn already glowing blue two blocks before I would have thought to make it, and I caught myself watching the little arrow slide along the road instead of watching the road. Somewhere behind that ease, an old reflex stirred. I found myself wondering, of all things, what had happened to the Thomas Guides.
There was a time when finding your way through San Francisco meant a spiral-bound book the size of a phone directory, kept in the door pocket or wedged under the seat, its cover gone soft and slightly oily from years of glove-compartment heat. You looked up a street name in the index, found a page number and a letter and a number — page 132, grid D3 — and turned to a small black-and-white rectangle of the city that resolved, for that moment, into something you could hold. Thomas Bros. had been drawing Southern California since 1915, when George Coupland Thomas and his brothers sold wall maps out of Oakland, and by 1945 the company had shrunk the whole sprawling region down to something that would fit in a car door. The timing mattered. The subdivisions were multiplying faster than the old fold-out maps could keep up with them. George Thomas liked to say his maps were accurate to within ten feet, which was a claim worth making and, it turned out, a claim worth stealing.
That’s where the trap streets come in. A company vice president named Barry Elias explained the trick in an interview years later: scattered through the guides were streets that did not exist. Short, usually a single block, dead-ended, drawn with a broken line as though still under construction — the visual grammar for not finished yet, so no one following the map too literally would drive into a field. The San Bernardino and Riverside County editions were said to be the thickest with them, low hundreds of invented streets tucked into real neighborhoods. Some were named to sound plausible, Spanish-inflected phrases that belonged to the landscape — La Taza Drive, Loma Drive. Others, according to people who worked there, carried the names of a cartographer’s child or dog, a private joke folded into public infrastructure. If a rival mapmaker’s cheap knockoff showed the same nonexistent cul-de-sac in the same place, there was no arguing about where it came from. The fiction was the proof.
I like that a business built on precision needed, here and there, a small deliberate lie to protect the truth of the rest of it. It’s the kind of quiet craft that doesn’t announce itself, and I don’t think I would have gone looking for it if I hadn’t been sitting in a car that no longer needed any of it — no index, no grid square, no glove box, just a screen that already knew.
Before any of this, before I’d heard of Thomas Guides or would have understood what a trap street was for, there were the free maps. Gas stations gave them away. You pumped your gas and the attendant handed you a folded map of wherever you were, no charge, the company’s logo across the top like a small act of civic generosity that happened to also be advertising. And then, sometime in the 1970s, they mostly stopped. I’ve always assumed it had something to do with the oil crisis — gas itself getting scarce and expensive enough that a company stopped throwing in a free map with it — though I’ve never been sure that’s the real reason and it may just be the story I’ve told myself because the timing fit. Whatever the cause, the free map disappeared, and after that, if you wanted one, you either bought it or you joined something. AAA required a membership, dues, an envelope in the mail. Being oriented had quietly become a thing you paid for, one way or another.
I knew the free maps first from the back seat. In the summer of 1960 my father packed my mother, my sister, and me into a blue Dodge Dart station wagon and drove us from Ohio to California and back, camping the whole way. Every evening before dark he would spread that day’s map out — hood of the car, picnic table, wherever we’d stopped — and study tomorrow’s drive. My mother kept the maps in the front seat, in charge of them the way someone is put in charge of the medicine or the money, and my father, who usually knew the way, would drive on his own certainty until he didn’t. That’s when the sparks flew. She’d try to get him to pull over and look. He’d think he already knew. I can’t tell you now what any particular fight was about, or how it resolved, only that it happened rarely enough to be memorable and that it always had the same shape: his confidence against her custody of the paper.
At home he had a Rand McNally road atlas of the whole country, the kind that lived on a shelf and got pulled down for no reason at all. I came to like it for its own sake, apart from any trip. I’d trace the roads we’d actually driven that summer, find the towns we’d camped near, follow the thin red lines out from Dayton toward places I now knew the taste of the air in. It wasn’t studying, the way my father studied. It was closer to rereading a book you already loved, tracing your own path back through it just to feel the shape of where you’d been.
I think about that atlas now next to the dashboard screen, and I don’t feel the loss I expected to feel when I started turning this over. What I actually feel, watching Apple Maps or Google Maps do instantly and without complaint what used to take my father twenty minutes of squinting at fine print by a Coleman lantern, is closer to plain amazement — that this much orientation now sits in a pocket, free again in a way the gas station maps never quite were, more accurate than any trap street was ever built to catch. My father’s confidence and my mother’s custody have both been absorbed into a piece of glass that argues with no one.
What I can’t decide is what got lost in the trade, if anything did. Maybe nothing. Maybe the studying itself — the folding, the tracing, the mild domestic argument over who really knew the way — was never really about the map at all, and the map was only ever the excuse two people needed to be lost together for a minute before deciding, out loud, where they were.
