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Curve Warning Signs

Construction Phase

Region 2: Willamette Valley and Northwest Oregon (Various)

​​​​​​​​​​​​​​​​​​​The project will update curve warnings signs to current standards and add curve warning signs, as needed, based on crash history.

Construction Banner


Traffic Impact

Single lane or shoulder closures along the routes. 

Construction Impacts

Wo​rk zones will be controlled by flaggers. Delays to traffic should be minimal since the lane closures will occur between 6:00 p.m. and 7:00 a.m.​

Construction Activities

​We are prepping, constructing and installing signs in multiple locations in sections along the highways. The signs have concrete bases that need to be prepped in stages. The crews will:

  • Dig out the footprint for the concrete pad.

  • Install the footings and rebar that strengthens the foundation.

  • Pour the concrete.

  • Once concrete has set, install the signs.

Why do we need such a large concrete pad for the new signs?

The new signs are large enough that they need additional foundation support. The posts are steel to better withstand weather and potential impacts from cars. The concrete pad helps support the heavy sign. 

The new sign posts are built with crash safety features to minimize damage to both the sign and vehicles. The sign post is designed to detach at the base on vehicle impact. The larger concrete pad provides a flat surface to help make sure the post can separate cleanly at the base. This reduces the damage to the car and allows us to reuse and easily reinstall the sign.



Over 50% of Oregon's curve warning and curve speed signs do not meet current national standards. This is because of outdated technologies used in initial curve speed analysis, changes in driving habits, improvements in vehicle safety features and inconsistent curve speed advisory changes that have happened over the past several decades. 

To create a more uniform and reliable curve warning system across the United States, the Federal Highway Administration (FHWA) has required that all curve signs meet the new standards.

Our Region 2 Curve Warnings Sign projects will update curve warning signs on various highways throughout the region. This will improve safety by having consistent curve advisory speed limits and installing signs that meet the national standards.

Because many curves have posted speed limits that are lower than the current standards for safe speeds, drivers often do not follow them. Instead drivers travel five, ten or more miles an hour over the posted curve speed limit.


Construction in 2021-2022.

When in construction, travelers can expect lane closures, flaggers and delays of up to 20 minutes where work is taking place.

TripCheck will have the most up to date information on traffic impacts.

Meetings and Events

Visit our archived online open houses to learn about these projects and other projects being built in 2021. 


N/A | ​​This project is located on various highways throughout Region 2:
US 101 | OR 126 | OR 36 | US 30 | US 26 | OR 34 | OR 229

Cost and Funding

​Estimated cost for all seven projects is $11.3 million​

Additional Information

​Projects across the region include:

Project #20222Project

​U.S. 101 Curve Warning Upgrades

U.S. 101 -  Milepost 0 to 167

Clatsop, Tillamook, Lincoln

Construction activities are underway.

ARTS Program.  $1,713,200

Project Manager: Ian Roholt

Project #20223Project Map

West Lane County Curve Warning Upgrades

OR 126 milepost 14.37 to 41.07
Territorial Highway (OR 200) milepost .6 to 42.08
OR 36 milepost 0 to 51.59

County:  Lane

Construction Year: 2022

ARTS Program, $1,004,400

Project Manager: Ian Roholt

Project #20189Project Map

North Curve Warning Upgrades

U.S. 30 milepost 18.37 to 99.34
U.S. 26 milepost 0 to 45.41

Columbia, Clatsop, Washington

Construction Year: 2022

ARTS Program, $1,809,509

Project Manager: Jayson Buchholz​


Project #20193Project MAp
South Curve Warning Upgrades

OR 34 milepost 0 to 58.6,
OR 229 milepost 0 to 21.24

Lincoln and Benton

Construction Year: 2022

ARTS Program, $1,589,400

Project Manager: Steve Schultz​

Contacts & Media

Curve Sign


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Project Contact

Public Information Officer
Angela Beers Seydel

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Last Updated

9/12/2022 12:32 PM

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