US 93

Why are US 93 mileposts in backward order?

Why are US 93 mileposts in backward order?

Why are US 93 mileposts in backward order?

Why are US 93 mileposts in backward order?

By David Rookhuyzen / ADOT Communications
August 3, 2020

If you think about it, US 93 is a bit odd.

Don't get us wrong, it's a fine highway. But it does have one particular quirk: Its mileposts go up as you to north to south, rather than the usual south to north.

As we mentioned in a post about exit signs some time ago, there is a general rule for how the milepost on highways are supposed to go. As a quick recap, highways start at mile marker "0" at the western or southern state line or terminus and increase as you head east or north.

Then there is US 93. 

Despite what we just said, milepost 0 is not at its junction with US 60 in Wickenburg, but rather where it enters from Nevada. 

We'll be honest: Why the highway is numbered like this is extremely hard to pin down. We don't have a firm answer, but there are two good intertwined guesses that rise to the top as we look at its history.

The first involves the fact that the stretch between Hoover Dam and Kingman was not originally US 93. It was US 466, a road comissioned in 1934 that ran from Morro Bay, California, to Kingman. However, starting the next year, Arizona was already petitioning to bring US 93 from its current terminus in Glendale, Nevada, down to Kingman and even beyond. The whole slew of proposals to bring US 93 further into the state, with too many ups and downs to mention in this post, is well-documented in the Federal Highway Administration's page on the history of US 93. Suffice it to say that in late 1935 extending the US 93 designation to Kingman was approved.

By 1939, road logs from the FHWA show US 93 as ending in Kingman, though we found other sources out there saying the designation didn't become co-signed with US 466 until as late as 1951. Either way, the US 466 designation was eventually given the ax in 1971, when California, Arizona and Nevada petitioned the American Association of State Highway and Transporation Officials to get rid of it because it had been mostly taken over by I-15 and US 93.

And this is the first guess about why US 93 is numbered the way it is. Even though it ran more or less north-south when it entered Arizona, US 466 was a west-east highway. So its mileposts would have started at "0" at the Nevada state line and increase as it went toward Kingman. Since US 93 was essentially overlayed on top of US 466, it stands to reason that the mileposts were simply not changed.

Our second guess goes back to those whole series of proposals to extend US 93. There were several proposed routes, including along what is today State Route 89 through Ash Fork and Prescott, and a few petitions to get the highway all the way to the international border with Mexico. So if the state was unsure where the road would eventually end, they couldn't very well number it south to north, something that would change depending on what would be eventually approved.

These two guesses are not necessarily mutually exclusive and each may have had a part to play in why US 93 is numbered liked it is. All of this goes back to the early days of numbering, when the state highway system was still taking shape. And, funny enough, US 93 is not alone in this quirk. State Routes 67, 587 and 85 (the portion extending from Gila Bend to Why and then the international border with Mexico) also have a north-to-south numbering scheme. But those are blog posts for another day.

Virtual technology helping ADOT boldly go forward

Virtual technology helping ADOT boldly go forward

Virtual technology helping ADOT boldly go forward

Virtual technology helping ADOT boldly go forward

By David Rookhuyzen / ADOT Communications
June 23, 2020

If 50 years of "Star Trek" has taught us anything, it's that virtual communication is the wave of the future. Kirk, Spock, Picard, Janeway and all the rest are constantly using viewscreens, communicators and holograms to connect with people who might be worlds away. 

While we may still be a long ways away from teleporters and starships, during the current public health situation we are looking toward technology to continue offering training and services.

Road projects have continued to move forward during this time, which means ADOT had make sure the public could have plenty of input. As we told you about recently, with traditional public meetings a non-starter we used a virtual town hall format for some projects, such as the future improvements to the Interstate 40 and US 93 interchange. People were able to use their communicators – known in this century as cellphones – to call in and listen to the presentation. The meeting was also broadcast via two radio stations. The number of comments we received from this meeting rivaled those of a tradition in-person open house.

When it came to continuing our offerings to help small or economically disadvantaged businesses seeking federally assisted contracts, those too are now being done virtually. These businesses can now receive counseling or take advantage of other tools, such as our 21-week Business Development Program, completely online.

Back in April, ADOT's Border Liaison Unit launched a webinar for Mexican truckers to discuss emergency restrictions and exemptions for commercial vehicles using the state's ports of entry. This proved so successful that future webinars are planned that will incorporate material from the in-person safety training the unit has been doing since 2016.

This month we also held another session of our popular Construction Academy to help women, veterans, minorities and other disadvantage groups get the necessary training to get into a career in construction. The majority of particpants were able to receive the necessary classroom training through video conferencing and online construction

And the best part is that these virtual tools have proven popular and useful enough to help our communication and training efforts live long and prosper even after the need to socially distance ends.

The technology we are using may not be as cool as what you'd find on the bridge of the Enterprise, but it's still allowing us to boldy go forward in our continuing mission to better communicate and serve the drivers of Arizona.

ADOT public meeting going virtual for first time

ADOT public meeting going virtual for first time

ADOT public meeting going virtual for first time

ADOT public meeting going virtual for first time

By Ryan Harding / ADOT Communications
May 27, 2020

Despite the current public health situation, highway improvements continue. And since public involvement is a crucial part of a highway project’s schedule, ADOT needed to get creative to keep the public engaged.

And that brings us to ADOT’s first project-level virtual public hearing on Thursday, May 28, for the I-40/US 93 traffic interchange project in west Kingman. This virtual public hearing will be a call-in event where the public can call in to listen to a presentation on the current status of the project and give their input and feedback.

The virtual hearing will also be broadcast live on local radio stations in the Kingman and Bullhead City area for those who just want to listen in.

Virtual meetings, which allow ADOT to gather public input and answer questions like it would at an in-person public meeting, are planned for upcoming construction projects in Tucson and Prescott Valley. 

It’s important to find ways to hold these hearings and keep the public involved so project schedules don’t get behind. Temporary solutions like virtual public hearings and meetings are creative solutions to keep the public involved and projects on schedule during a time where we can’t meet together.

The public comment period is also open right now until Saturday, June 6. People can offer their comments online, through email, phone or mail. Every comment received gets recorded in the environmental record.

For more information on how to participate, please visit azdot.gov/WestKingmanTIP.

ADOT seeks input on future I-40/US 93 interchange project

ADOT seeks input on future I-40/US 93 interchange project

I-17 101 traffic interchange

ADOT seeks input on future I-40/US 93 interchange project

ADOT seeks input on future I-40/US 93 interchange project

May 7, 2020

PHOENIX – The Arizona Department of Transportation is seeking input on a project to build a freeway-to-freeway interchange between US 93 and Interstate 40 in west Kingman by hosting the agency’s first project-level virtual call-in public hearing.

Given social distancing requirements due to the current public health situation, the public will be able to call in and submit comments during this virtual hearing scheduled for 6 p.m. Thursday, May 28. Those who want to participate can call 833.380.0669 at the time of the event. The public hearing also will be broadcast live on KAAA-FM, KZZZ-FM and KZZZ-AM in the Kingman and Bullhead City areas.

ADOT has been conducting an environmental assessment and a preliminary design of the interchange that will create a free flow of traffic between the two highways. The draft environmental assessment is ready to share with the public and can be found online at azdot.gov/WestKingmanTIP

Public comments will be accepted from Thursday, May 7, through Saturday, June 6. They can be submitted through the website at azdot.gov/WestKingmanTIP, by email at [email protected], by phone at 602.474.3919 or by mail to West Kingman TI Study Team, c/o HDR Inc., 20 E. Thomas Road, Ste. 2500, Phoenix, AZ 85012.

Construction of the first phase of this interchange is slated for 2024.

For more information, please visit azdot.gov/WestKingmanTIP.

Throwback Thursday: How far we've come

Throwback Thursday: How far we've come

Throwback Thursday: How far we've come

Throwback Thursday: How far we've come

By David Rookhuyzen / ADOT Communications
September 12, 2019

Today we are throwing back to the near past and one of the first of a series of projects to upgrade US 93 between Wickenburg and the Nevada state line.

Over the past two decades, ADOT has invested nearly half a billion dollars into turning this busy corridor between the Valley and Las Vegas into a four-lane divided highway, all with an eye toward the future Interstate 11.

This photo is from April 2006 and shows work happening to put new bridges over Burro Creek, south of Wikieup, and represents one of the earliest completed projects toward that goal. This bridge, and another over Santa Maria River, were completed in 2008. 

As we told you about at the beginning of the year, 161 miles of the highway have received these improvements and another 13-mile section north of Wikieup is currently being worked on. You can read more about the scope of the US 93 improvements on our website.

 

Public meeting planned for US 93 project in Wickenburg

Public meeting planned for US 93 project in Wickenburg

I-17 101 traffic interchange

Public meeting planned for US 93 project in Wickenburg

Public meeting planned for US 93 project in Wickenburg

February 27, 2019

PHOENIX – The Arizona Department of Transportation will host a public meeting to present final design plans for an upcoming project that will improve traffic flow on US 93 between SR 89 and Tegner Street in Wickenburg.

The public meeting, which will be held from 6 to 8 p.m. Tuesday, March 5, at the Wickenburg Community Center on 160 N. Valentine St., will present project information and give the public opportunities to provide comments.

The project includes widening US 93 to two lanes in each direction, constructing raised center medians and constructing frontage roads and roundabouts at Rincon, Cope, Vulture Mine and Scenic Loop roads, and at State Route 89.

Construction is currently scheduled for fiscal year 2020.

Residents, business owners and other stakeholders are encouraged to attend the meeting, learn more about the project and submit comments. Representatives from the ADOT study team will be available to answer questions.

If you cannot attend the meeting, there are other ways to submit comments:

  • Phone: 855.712.8530
  • Online: Visit azdot.gov/contact and select Projects from the drop-down menu
  • Mail written comments or questions to:
    ADOT Communications
    1109 Commerce Drive
    Prescott, AZ 86301
    Attn: Deborrah Miller

All comments must be received by April 5 to be included in the public record.

For more information on this and other US 93 projects, visit azdot.gov/US93corridor.

US 93 improvements advancing with latest widening project

US 93 improvements advancing with latest widening project

US 93 improvements advancing with latest widening project

US 93 improvements advancing with latest widening project

February 1, 2019

By Ryan Harding / ADOT Communications

161.

That’s the number of miles of US 93 between Wickenburg and the Nevada state line that have been upgraded to four-lane divided highway. And we're launching a $35.5 million project that will add nearly 4 more miles to that total.

Blog-2019-0201-us-93

This work just north of Wikieup, between Carrow and Stephens, will connect two sections of highway that have already been divided. That will create a 13-mile continuous stretch of divided four-lane highway from milepost 108, about 15 miles south of I-40, and milepost 121 near Wikieup. That’s the number of miles of US 93 between Wickenburg and the Nevada state line that have been upgraded to four-lane divided highway. And we're launching a $35.5 million project that will add nearly 4 more miles to that total.

Keeping a future Interstate 11 in mind, ADOT has invested more than half a billion dollars over the past 20 years to turn the primary route between Phoenix and Las Vegas into modern four-lane divided highway. Click on the image at right for a detailed look at what's been completed and what's currently planned.

The upgrade to a four-lane divided highway improves traffic flow, supports the movement of freight and enhances safety through this heavily traveled area. The entire northern segment of US 93 from Kingman to the Nevada state line (mileposts 1 to 68) is now a four-lane divided highway following the completion of a $71 million project in 2010.

Work is expected to launch in the next few weeks, with the majority taking place off of the highway and not impacting motorists for some time.

You can read more about our past, current and planned work for US 93 on our projects website.

Busy year ahead for highway projects in northern Arizona

Busy year ahead for highway projects in northern Arizona

I-17 101 traffic interchange

Busy year ahead for highway projects in northern Arizona

Busy year ahead for highway projects in northern Arizona

January 23, 2019

PHOENIX – This year will be filled with highway system improvements for northern Arizona travelers, including the start of the latest Arizona Department of Transportation project expanding US 93 to four-lane divided highway between Wickenburg and Interstate 40.

Crews will soon launch a $35.5 million project on nearly 4 miles of US 93 just north of Wikieup, between Carrow and Stephens, connecting two sections of highway that have already been divided. That will provide a continuous stretch of divided four-lane highway from milepost 108, about 15 miles south of I-40, and milepost 121 near Wikieup.

With an eye toward an Interstate 11, ADOT has invested more than half a billion dollars over the past 20 years to turn the primary route between Phoenix and Las Vegas into modern four-lane divided highway. The upcoming project is part of $155 million in US 93 improvements planned over the next five years.

Currently all but 39 miles of the 200-mile drive from Wickenburg to the Nevada state line has been upgraded to a four-lane divided highway to improve traffic flow, support the movement of freight and enhance safety through this heavily traveled area. The entire northern segment of US 93 from Kingman to the Nevada state line (mileposts 1 to 68) is now a four-lane divided highway following the completion of a $71 million project in 2010.

Meanwhile, paving projects to repair long-term winter weather damage will continue in the Flagstaff area, with crews finishing paving along northbound I-17 from milepost 312 to the I-40 interchange and along the 17-mile stretch of I-40 between Cataract Lake and Parks west of Flagstaff.

Last year, crews rebuilt about 20 miles of highway in northern Arizona, providing a long-term fix to damage from freeze-thaw cycles and heavy traffic. In all, ADOT has improved or is in the process of improving 62 miles of interstate freeway in the Flagstaff area.

This spring, ADOT will launch a project to repave 13 miles of State Route 89A from Sedona to the Pumphouse Wash bridge between mileposts 374 and 387. The project will also install new guardrail.

In far northwestern Arizona, the decks of three Virgin River bridges along Interstate 15 will get makeovers starting early this year. Bridge Nos. 2 and 5 will get newly resurfaced decks. Bridge No. 4 will received a brand new deck.

For more information on these projects, please visit azdot.gov/projects.

ADOT completes widening of another US 93 section north of Wickenburg

ADOT completes widening of another US 93 section north of Wickenburg

I-17 101 traffic interchange

ADOT completes widening of another US 93 section north of Wickenburg

ADOT completes widening of another US 93 section north of Wickenburg

December 3, 2015

PHOENIX ‒ With five more miles of US 93 expanded to four-lane divided highway north of Wickenburg, the Arizona Department of Transportation is another step closer to its goal of transforming the 200 miles to Hoover Dam into a modern thoroughfare.

Nine months of work concluded in late November just outside Wickenburg, from milepost 185 to 190 and between state routes 71 and 89.

The $12.5 million improvement project, which included building two new southbound lanes and reconstructing the two existing northbound lanes to tie in the new roadway configuration, was funded through the Federal Highway Administration’s Highway Safety Improvement Program.

While all four lanes are now open, ADOT will need to return in spring to complete final paving, which will include applying the top layer of asphalt to make the roadway smoother.

This is the second of two US 93 expansion projects ADOT has worked on this year. In June 2015, it completed a $20 million improvement project to widen the Antelope Wash section (mileposts 101-104) north of Wikieup.

For the past two decades, ADOT has made the US 93 corridor a priority, investing $350 million to convert what was a two-lane rural roadway to a modern four-lane divided highway.

Stretching from Wickenburg northwest to the Nevada state line, the US 93 corridor has been designated as part of the potential alignment for the proposed Interstate 11 and Intermountain West Corridor from Nogales to Las Vegas. I-11 is part of ADOT’s Key Commerce Corridors plan, which would require investment in transportation infrastructure to increase trade, tourism, commerce, job growth and economic development through Arizona and the entire Intermountain West.

Currently, all but 41 miles of the 200-mile drive from Wickenburg to the Nevada state line has been upgraded to a four-lane divided highway to improve traffic flow, support the movement of freight and enhance safety through this heavily traveled area. The entire northern segment of US 93 from Kingman to the Nevada state line (mileposts 1-68) is now a four-lane divided highway following the completion of a $71 million project in 2010.

Future US 93 widening projects will depend on statewide priorities and available funding.

ADOT works to inform the public about planned highway restrictions, but there is a possibility that unscheduled closures or restrictions may occur. Weather can also affect a project schedule. To stay up to date with the latest highway conditions around the state, visit the ADOT Traveler Information System at az511.gov or call 5-1-1.

US 93 traffic switch planned for Thursday north of Wickenburg for widening project

US 93 traffic switch planned for Thursday north of Wickenburg for widening project

I-17 101 traffic interchange

US 93 traffic switch planned for Thursday north of Wickenburg for widening project

US 93 traffic switch planned for Thursday north of Wickenburg for widening project

September 29, 2015

PHOENIX — The Arizona Department of Transportation continues to make considerable progress on an improvement project to widen and upgrade a five-mile segment of US 93 between State Route 71 and State Route 89, just north of Wickenburg.

On Thursday, Oct. 1, crews are scheduled to switch both directions of traffic to the newly constructed southbound lanes. As crews make preparations for the planned traffic switch, motorists may be stopped intermittently for up to 15 minutes at a time between 6 a.m. and 6 p.m. on Oct. 1.

While one travel lane will remain open in both directions, motorists should continue to be prepared to allow 10 to 15 minutes extra travel time through this segment (mileposts 185-190).

Once the traffic switch is complete, ADOT will begin work to repave and restripe the existing northbound lanes.

ADOT began this expansion project in February to widen US 93 from two lanes to a modern, four-lane divided highway. The $12.5 million project is expected to be completed in November.

Once completed, ADOT will move one step closer to the agency’s ultimate goal of transforming the entire 200-mile stretch from Wickenburg to the Hoover Dam bypass bridge into a modern, four-lane divided highway.

Since 1998, ADOT has invested more than $350 million in projects to upgrade the US 93 corridor, which stretches from Kingman to the Nevada state line and Wickenburg to Interstate 40 (a 23-mile segment of I-40 east of Kingman connects the north and south sections of US 93).

Currently, all but 46 miles of the 200-mile drive (more than 75 percent) from Wickenburg to the Nevada state line has been upgraded to a four-lane divided highway in an effort to improve traffic flow, support the movement of freight and enhance safety through this heavily traveled area.

For the most current information about highway closures and restrictions statewide, visit ADOT’s Travel Information Site at az511.gov, follow us on Twitter (@ArizonaDOT) or call 5-1-1.