Colorado

[thspfc]

How common is a "sun glare closure" on I-70? Ran into one today eastbound at exit 244, first time I've ever encountered that. I suppose drivers would be looking straight into the sun going up the hill there.

[JayhawkCO]

How common is a "sun glare closure" on I-70? Ran into one today eastbound at exit 244, first time I've ever encountered that. I suppose drivers would be looking straight into the sun going up the hill there.

It's more of an issue coming down the hill at sunrise, so much so that CODOT puts up signs to warn people.

https://www.codot.gov/news/2023/november/sun-glare-closures-on-eastbound-i-70-at-floyd-hill

[Gulol]

For example, take the highway between Silver Creek Junction and Heber City, Utah, which is US 40/189. It is pretty much universally known as US 40. 189 wasn't even signed at all along it until a few years ago, and still isn't fully. But Google labels it as 189. At least on the computer, you have to zoom way in before any 40 shields start popping up.

I remember UDOT having an "End 189" sign up at the US 40 junction in Heber (for traffic coming up from Provo).

Similar to the "End 36" sign where US36 meets I-25/I-270.

Or my favorite along Meadows Pkwy in Castle Rock, the standalone South 85 sign with a directional arrow before you approach the south I-25 ramp, then cross the I-25 overpass to be met with an END South 85/Begin East 86 sign.

[jlam]

Or my favorite along Meadows Pkwy in Castle Rock, the standalone South 85 sign with a directional arrow before you approach the south I-25 ramp, then cross the I-25 overpass to be met with an END South 85/Begin East 86 sign.

There's something similar to this in Lyons, where there's an END CO 7 sign at its intersection with US 36 on the western (northern?) end of the unsigned concurrency. I don't think there's a sign on the other end, since Boulder doesn't have great signage. There isn't even a sign for US 36 at that intersection.

[Plutonic Panda]

Looks like Colorado is the next state to begin using automated speed enforcement photo technology in construction zones:

https://www.denverpost.com/2025/02/03/colorado-photo-radar-highways-construction-zones/

[Elm]

I-25's Happy Canyon Road interchange will probably be rebuilt as a DDI, with construction starting 2027 at the earliest. The City of Castle Pines is leading the project and has posted a webpage here. Public meeting coming March 31.

Sounds like they may have been leaning toward a SPUI at one point (it shows up in a 2022 presentation), but the DDI is expected to be $10 million cheaper. The interchange is meant to be rebuilt before extending Happy Canyon east to Canyonside Blvd, which will make it a main outlet for the Canyons development on the east side of I-25.

(In other roadway connections, Canyonside Blvd will extend down to Crowfoot Valley Rd at Macanta Blvd. There was initially going to be a minor connector to Cinnabar Dr to give Sapphire Point / Diamond Ridge an egress other than Crowfoot Valley, but that neighborhood's been opposed, and it looks like that's down to emergency-only.)

[Great Lakes Roads]

CDOT will be rebuilding the Speer Boulevard interchange on I-25 into a DDI... As part of this project, CDOT will be rebuilding both the 23rd Ave. and Speer Blvd bridges.

[seicer]

Tracing the History of U.S. Route 24 from Genoa, Colorado's Wonder Tower

Passing through the open plains of eastern Colorado, we made a brief stop at one of the state's more peculiar roadside relics: the World's Wonder View Tower. From here, you can trace the evolution of American travel—layered like sediment across the landscape. Down below, a railroad cuts a sharp line across the prairie. Nearby are the remains of early highway alignments and, farther still, the steady hum of Interstate 70.

[zzcarp]

US 6/Loveland Pass is closed indefinitely due to a large mudslide over the road that happened Sunday morning, approximately 100 feet wide and 20 feet deep. It apparently is an active slide still and CDOT says to expect an extended closure. As US 6 is the hazmat bypass of the Eisenhower/Johnson tunnels, this closure means there are periodic traffic stops at the tunnel to escort hazmat vehicles from one end to the other.

[74/171FAN]

US 6/Loveland Pass is closed indefinitely due to a large mudslide over the road that happened Sunday morning, approximately 100 feet wide and 20 feet deep. It apparently is an active slide still and CDOT says to expect an extended closure. As US 6 is the hazmat bypass of the Eisenhower/Johnson tunnels, this closure means there are periodic traffic stops at the tunnel to escort hazmat vehicles from one end to the other.

Loveland Pass reopened on June 18th.

[MASTERNC]

Looks like Colorado will be the first US state to deploy average speed cameras (in work zones)

[zzcarp]

Looks like Colorado will be the first US state to deploy average speed cameras (in work zones)

$10 says they'll start putting them in the buffer zones where there is no construction or on places like E-470 between I-70 and 104th, where construction has been substantially completed for months but they still have a reduced 65mph speed limit. As with the Expresstoll lane violation cameras, it's going to be about revenue, not safety.

[kphoger]

Unless I've missed something, I believe each such zone is still required to have signs posted alerting drivers to the enforcement:

Title 42 — Vehicles and Traffic
Regulation of Vehicles and Traffic

Article 4 — Regulation of Vehicles and Traffice
Part 1 — Traffic Regulation - Generally

§ 42-4-110.5 — Automated vehicle identification systems - exceptions to liability - penalty - limits on use of photographs and video - rules - legislative declaration - definitions

(2) — A county, city and county, or municipality may adopt an ordinance authorizing the use of an automated vehicle identification system to detect violations of traffic regulations adopted by the county, city and county, or municipality, or the state, a county, a city and county, or a municipality may utilize an automated vehicle identification system to detect traffic violations under state law, subject to the following conditions and limitations and, as applicable, the requirements for state highways set forth in and any rules adopted by the department of transportation pursuant to subsection (2.5) of this section.

— (g) (I.7) — Before the state, a county, city and county, or municipality begins operation of an automated vehicle identification system in an automated vehicle identification corridor, the state, county, city and county, or municipality must:

— — (A) — Post a permanent sign in a conspicuous place not fewer than three hundred feet before the beginning of the corridor; and

— — (B) — Post a permanent sign not fewer than three hundred feet before each static camera within the corridor thereafter or a temporary sign not fewer than three hundred feet before any mobile camera; except that, for an automated vehicle identification corridor on which an automated vehicle identification system is used on transit vehicles for the purpose of detecting unauthorized use of a transit-only lane, post permanent signs at one-half mile or more frequent intervals;