Today, that 20-minute rule is absurd. His wife, Vicki Kirsch, budgets five to six times that long to drive from their home northeast of downtown to her job teaching music at UCLA about 15 miles away.

Traffic data analytics firm Inrix ranked L.A. traffic not just the worst in the country, but the worst in the world in 2017, saying drivers spent more than 100 hours a year delayed by congestion.

It was not much better in the San Francisco Bay Area, ranked fifth most congested worldwide, where drivers were stuck in traffic almost 80 hours, according to Inrix.

The limited-access highways in urban areas were conceived in the 1920s as a way to provide speedier thoroughfares for cars while excluding streetcars, pedestrians and intersections.

That history can be traced less than a mile from Alexander and Kirsch’s home on a drive they take nearly every day down the Arroyo Seco Parkway, one of the earliest freeways in the country.

Its opening in 1940 was a seminal moment, said Matthew Roth, historian for the Automobile Club of Southern California.

“Once you build a piece of freeway, you have determined future actions,” he said. “Once those lines are laid down in concrete, subsequent construction is going to have to connect with them.”

In the decades that followed, California did connect them -- financing and designing a massive network of freeways that spans more than 50,000 miles across the state, a system that would become a model for the rest of the country.

“California was the right place, but it was also the right time,” said Brian Taylor, an urban planning professor who directs UCLA’s Institute of Transportation Studies.

The rise of the automobile was happening everywhere, but California was uniquely poised to embrace it, said Taylor, because it coincided with the state’s period of maximum growth. In the two decades after World War II, there was booming industry, plenty of land to develop and the population doubled. Car ownership was growing even faster than the population, with car registrations increasing by 10 percent a year between 1946 and 1958, according to the state Department of Motor Vehicles.

In 1947, the state began raising the gas tax to fund the freeways with the landmark Collier-Burns Act, setting up a gas tax highway trust fund which would be copied at the federal level a decade later. Previously, most roads had been funded on an ad hoc basis through bonds, tolls or local property taxes.

The State Division of Highways, the precursor to Caltrans, built about a hundred miles of new freeway a year between the mid-'50s and mid-'60s, including sections of Highway 101 in Northern and Southern California, and much of Interstate 5, along with interstates 405 and 280.

Taylor said these roadways were designed for high speed and high capacity by an agency that had previously been responsible only for rural highways.

“We were off to the races building these big super highways that had really been designed to move people at 70 mph between cities rather than 15 mph within cities” he said.

What started as a hodge-podge of more modest facilities like Arroyo Seco Parkway, initiated and built at the local level and designed to fit the crowded urban environment, turned into a state-orchestrated effort that transformed urban landscapes with high-capacity speedways cutting through the heart of cities and out to their fringes.

Yet only about half the freeways that were planned for the state were ever built. By the 1970s cities were revolting against displacement and smog. Taylor’s research shows that state spending on freeways continued to increase, even as the number of miles constructed plummeted because of cost inflation.

Almost as quickly as it began, the era of freeway building came to an end. But Taylor said its legacy can still be felt, and has only compounded as California cities have grown and densified.

“These facilities supported development very far from the city center and created an expectation that it was somehow normal and reasonable to travel very far,” he said.

The success of the freeways helped drive commerce, development and population growth across the state. The state’s population nearly tripled in the last half of the 20th century and the once-sparsley populated suburbs began merging with the big city centers.

But Taylor said it’s a mistake to view the resulting vehicle traffic as a sign of failure or dysfunction.

“Congestion is a problem that arises from all of the activity we have in cities,” he said. “Cities exist because they push lots of activities together in a place. But when you push things together, things get crowded and slowed down.”

Congestion, not free movement, is the natural state of thriving cities. So what Michael Alexander experienced in 1964 -- the dream of driving across a city in 20 minutes -- was an anomaly, a blip brought on by a sudden burst of new capacity.

It’s likely the dream of a 20-minute car commute will live on only in the memories of folks like Alexander.

“I love the advantages the car culture gave me,” he said. “But I’m the beneficiary of something that might not have been best for society in the long run.”

The California Dream series is a statewide media collaboration of CALmatters, KPBS, KPCC, KQED and Capital Public Radio with support from the Corporation for Public Broadcasting, the James Irvine Foundation and the College Futures Foundation.