Category: Routes

CARxR 1.09: Highway Numbering: Interstate HighwaysCARxR 1.09: Highway Numbering: Interstate Highways

In this episode, we continue our exploration of numbering of state highways by turning our attention to the Interstate Highway system. This system, started in 1956, uses the red, white, and blue shields. It is the third episode in a four part miniseries on highway numbers in California. In this episode we talk about the history of the Interstate Highway system, how the Interstate Highways are numbered, the history of California’s chargable interstates (i.e., highways that counted towards the federal 42,500 mile limit), the history of California’s non-chargeable interstates, some interstate submissions that were never approved, and we opine about some of the most common questions about California interstates.

There is no interview. We’re going to move the interview segments into separate bonus episodes, owing to the difficulty of obtaining and scheduling the interviews.

The remaining episode in this miniseries will explore the numbering of and the history of California’s signed county route system.

Here’s the link to the show:

And here’s the link on Spotify for Podcasters:

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CARxR 1.08: Highway Numbering: U.S. Highways (Part I)CARxR 1.08: Highway Numbering: U.S. Highways (Part I)

In this episode, we continue our exploration of numbering of state highways by turning our attention to the U.S. highway system. These are the white shields with black numbers. It is the second episode in a four part miniseries on highway numbers in California. In this episode we talk about the history of the US highway system, how the US highways are numbered, how things have changed in the post-Interstate era, and we wax rhapsodic on the nostalgia of US highways. The remaining episodes in the miniseries will explore the numbering of and the history of California’s Interstates, and the signed county route system.

Our interview for this episode was to be with Jim McDonnell of AASHTO on AASHTO’s role in assigning US and Interstate numbers. But we’ve run into scheduling difficulties and haven’t been able to coordinate a recording time by our scheduled drop date. So consider this Part I of the episode. When we can get things coordinated with Jim we’ll record and release Part II.

Here’s the link to the show:

And here’s the link on Anchor.FM:

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CARxR 1.07: Highway Numbering: State Highways and Post MilesCARxR 1.07: Highway Numbering: State Highways and Post Miles

In this episode, we explore numbering systems in state highways. It is the start of a four part miniseries on highway numbers in California. Specifically, this episode explores the rhymes and reason for the assigning of signed route numbers to highways with the state shield. This includes looking at the patterns in those numbers, and how the numbering system stands today after the Great Nenumbering. The subsequent episodes in the miniseries will explore the numbering system of US Highways, the numbering of and the history of California’s Interstates, and the signed county route system.

The episode also explores another numbering system on state highways: Post Miles. As opposed to sequential mileage numbers as is found in other states, California uses a system called post miles that identifies points along a highway using a combination of a county and a mile point from the southern/western county line, possibly with clarifying prefixes or suffixes. We discuss this system is good detail.

Our interview is with Andy Richardson, who retired from Caltrans as a Subject Matter Expert in Geographical Information Systems, Linear Referencing Systems, and Postmiles. Andy worked as a GIS specialist for the State of California since 1988, including Caltrans between 2001 and his retirement in 2021. In his last years at Caltrans, he implemented the Department’s current Linear Referencing System.

Here’s the link to the show:

And here’s the link on Anchor.FM:

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CARxR Ep. 1.04: Expanding the State Highway System after WWIICARxR Ep. 1.04: Expanding the State Highway System after WWII

In this episode, we’re continuing to explore the history of the State Highway System, focusing on the period as WWII was ending, the Interstate system was emerging, and the construction boom was starting. This is part of our first season of California Highways: Route by Route, where we are exploring the background needed for our route by route journey. In this episode, we see the birth of the Freeway System in California, starting with the Collier-Burns act increasing state funding for highways, and State and Federal recommendations for higher-capacity systems. We see the growth in cities and urban areas pushing demand for the same, leading to the definition of the Freeway and Expressway System. We cover the passage of the 1956 Interstate Highway Act, and the subsequent freeway conversion and construction boom. Our guest interview is with Dr. Jonathan L. Gifford of the Schar School of Policy and Government at George Mason University. He is also the director of the Center for Transportation Public-Private Partnership Policy. His doctoral dissertation examined the history and development of the interstate highway system from its origins in the 1930s through its design and deployment in the 1960s and beyond.

Here’s the link to the show:

And here’s the link on Anchor.FM:

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Episode 1.02: Building a State Highway System: The 1920sEpisode 1.02: Building a State Highway System: The 1920s

This first season of California Highways: Route by Route establishes the background listeners will need for our subsequent route by route podcasts. We’re starting with a history of the state highway system. In Episode 1.01, we discussed how the highway system started and got through the first three bond acts that created a large number of today’s routes. This second episode explores the 1920s: the start of the gas tax, the Melville Act that allowed the state to take over traversable highways through small cities that cannot afford them, as opposed to just rural highways between cities, the impact of the Breed Bill, and the establishment of the Division of Highways (today’s Caltrans). We’ll go over some of the major highways added during this time period, and most importantly, we’ll discuss the start of the Federal Highway system, better known today as the US Highways. We’ve got a special interview related to that subject: Joel Windmiller, President of the California Chapter of the Lincoln Highway Association.

Here’s the link to the show:

Here’s a link to the show on anchor.fm:

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Episode 0.02 – Route 105 – It Only Takes a Century (Sample Episode)Episode 0.02 – Route 105 – It Only Takes a Century (Sample Episode)

This is a sample episode to show what the Route by Route format will be, as we don’t expect to start exploring routes until the second season. The first season will be mostly background: The history of the California State Highway system, explorations of how highways are numbers, exploring how highways are named, and the entities you’ll be hearing about in the episodes, such as the CTC. But we know you want the routes, so we decided to do a sample one for you. This episode focuses on Route 105.

The episode covers the following topics:

  • Legislative Route 105
  • 1965-1968 Interstate 105
  • Post 1968 Interstate 105 – The Century Freeway
  • Why I-105 doesn’t end at I-5
  • The construction and the consent decree
  • Names on the Highway
  • Significant Problems
  • Major Current Projects

Here’s the link to the show:

Here’s a link to the show on anchor.fm:

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