Showing posts with label Cal Trans District 8. Show all posts
Showing posts with label Cal Trans District 8. Show all posts

30 June 2026

Chino Valley Champion Article on Latest Truck Accident and Proposed Widening Project on Carbon Canyon Road

Last Saturday's Chino Valley Champion published an article on another truck crossing the centerline of State Route 142 (Carbon Canyon Road) at the S-curves in Chino Hills and causing an accident (fortunately not causing significant injury, though it could have).  

Incidentally, this blogger, just days later, had to do what was mentioned, pull over to the dirt shoulder at the curve in Sleepy Hollow—which is being left out of consideration regarding this problem of trucks crossing the centerline of the highway—when a semi moved into the opposing lane.  It happens a lot more than people realize.

Note at the end of the article the quotes from CalTrans and a consultant about the widening of the highway at the proposed location, as well as the response from a City of Chino Hills spokesperson.

Read Marianne Napoles' piece here.

11 June 2026

Carbon Canyon Road S-Curve Zoom Meeting Summary

Last night, CalTrans District 8, which covers the San Bernardino County portion of Carbon Canyon belatedly held a public Zoom meeting to discuss the project to "improve" the S-curves on Carbon Canyon Road, which is California Highway 142, with around 100 concerned residents gathered at the McCoy Equestrian Center Barn for the gathering.  The confab included a relatively brief, pro-forma recitation by CT officials of an overview, background and timeline of the proposed project, which could take up to four years to complete including environmental review, design and construction, while public comment is taking place this month and in July.

As with other projects like this, there are the build and no-build alternatives, but the claim is that the work to widen the S-curves and install retaining walls and other elements is to improve safety, even as the completion of the project would allow more volume because it was made abundantly clear that the ban of trucks of 5 axles or more, implemented a couple of years ago, with several years of concerted action from the cities of Brea and Chino Hills, would almost certainly be rescinded either way, meaning whether the "improvement" was made or not.

Also striking was the reiteration on several occasions by a CT official that this project came about because of public concerns of trucks crossing the centerline striping at the S-curves and so the claim was that this effort to widen the roadway and other aspects was the only real response the agency could make.  The obvious problem with this from the standpoint of those who spoke during the Q&A, considered informal so not recorded for the public record, and the oral comment portion, which was formalized and recorded, is that this was not the reason for the concerns.  

It should be noted that none of the dozens of persons who asked questions or spoke during the meeting, including a former Chino Hills councilmember and mayor, the current mayor and a city official, voiced support for the project.  So, if CT's contentions about concerns from the public were that this project was warranted, why did the public who expressed current concerns agree en masse that this is not what was intended when complaints were registered with the department?

Another remark by a CT official that raised eyebrows was the statement that the project was not intended to add more trucks to traffic on the state highway, but to more broadly improve traffic flow.  As many speakers pointed out, as often as accidents occur at the S-curves—a property owner with expensive cast-iron fencing and walls has, yet again, had these plowed into by a car within the last couple of weeks, and a section at Carriage Hills Lane has been the site of many crashes that have caused power outages throughout the Canyon—the way this section is constructed actually serves to slow most traffic down.  Yet, CT has insisted on adding so many signs, in the belief that this will somehow deter dangerous driving, when only enforcement can mitigate this, that it is almost comical to see how cluttered the roadway has become, yet the behavior continues.

It was also remarked that, while this work may be viewed by the agency as necessary and effective, the isolation of the S-curves from the rest of the state highway seems more than self-defeating.  For example, there are curves in Sleepy Hollow, principally at the east entrance to Rosemary Lane, where trucks routinely cross the centerline and have, in fact, swipes mailboxes and vehicles, while others routinely honk their horns as a warning, but with very limited sight lines.  There is no way to remediate the highway in that location and this is true at another curve to the west under which Carbon Creek passes, while sections in Brea may well involve the same general issues.

Other questions and comments concerned the absolute bare minimum of public notice, the inadequacy of holding a Zoom meeting so that an in-person gathering was requested, the fact that the documents so far prepared were insufficient, the call for a permanent ban on trucks—which CT personnel said would involve the cities going through a similar process to the current one (meaning years of struggle), and more.  One commenters wanted to know who was behind this project in terms of either the complaints registered that led to the interpretation that this work was the best response or who may be lobbying (a common perception is that Amazon, readying to establish a distribution center just outside the canyon on the 142 [the Valencia Avenue portion] in Brea, is behind this) for the work.


Perhaps the most remarkable claim from CT officials was that the ban instituted in the last couple of years was temporary and was always intended to be so.  While City of Chino Hills officials were clear in saying that this was not the case, the response from the department was that it was in the agreement signed by Chino Hills and Brea.  The obvious question is:  what will be the future communications between the municipalities and Cal Trans about this vital issue?

There will, of course, be more to come, but the salient matter right now is for those concerned about this project—and nothing said by CT staff alleviated any concerns, from what this observer heard and saw—this is the time to comment, during this and next month.  There is also the Hope for the Hills campaign against the project

13 August 2025

More Carbon Canyon Road Electrical Maintenance Work Tomorrow 14 August

See below, but please note that CalTrans issued its commuter alert and misidentified the closure locations:  it is from CANYON HILLS ROAD to Oak Way Lane.  Click on the link to see the alert and note the map for the route closure locations:

The California Department of Transportation (Caltrans) will be conducting road maintenance on State Route 142 (Carbon Canyon Road) on Thursday, August 14, from 9:00 am to 3:00 pm. Crews from West Electrical Maintenance will be performing routine utility electrical maintenance that will require one-way traffic control from Carbon Canyon Road to Oak Way Lane. Please watch for signage and remember to reduce your speed in and around work zones. For questions, please contact Caltrans District 8 at (909) 329-9747

14 April 2018

New Share the Road Signs on Carbon Canyon Road

This morning personnel from District 8 of CalTrans were out and quickly and efficiently, over the course of a few hours, put up signs and painted markings along and on Carbon Canyon Road, on the San Bernardino/Chino Hills portion of the Canyon only from the county line to Old Carbon Canyon Road at the east end of the summit, warning motorists to "Share the Road" with bicyclists.


The state highway has long been a favorite route for riders and for obvious reasons: it winds through some nice scenery and provides a break from the urban areas on either side of the canyon.  Obviously, funds from either county or state taxes were made available for these improvements and, hopefully, drivers will be more aware of bicyclists as they travel through the canyon, especially on weekends.

One of the big issues, though, is that state law requires at least a 3-foot separation from a motor vehicle and a bicyclist on any road.  That is generally not a problem for most streets and highways, but, then again, Carbon Canyon Road is different than most thoroughfares.  There are sections that are very narrow with no shoulders and no way to maintain that separation when passing a bicyclist.  That means having to slow and ride behind the bicycle until there is room to provide that 3-foot cushion.


Then, there is the winding, curving nature of the roadway, which is one of its main attractions, but also one of its principal concerns.  Signs and markings are certainly helpful and better than the absence of them, but there have been collisions involving bicyclists with injuries and the occasionl fatality.  Riders should remember to constantly be watching traffic behind and in front and drivers, who are all-too-often distracted, need to be very mindful of who is riding on the highway.