Variable message signs, queue detection, and lighting
Summary
SCH Number
2025111160
Public Agency
California Department of Transportation, District 4
(DOT)
Document Title
Variable message signs, queue detection, and lighting
Document Type
NOE - Notice of Exemption
Received
Posted
11/26/2025
Document Description
The project would install variable message signs with flashing beacons and a radar-based detection system to provide motorists with advance warnings of traffic queues or incidents. Additional safety lighting would be installed on the Mare Island westbound on-ramp to improve visibility and merging operations.
Contact Information
Name
Skylar Huyen Nguyen
Agency Name
Caltrans District 4
Job Title
Senior Environmental Scientist (Specialist)
Contact Types
Lead/Public Agency
Address
Phone
Email
Location
Coordinates
Cities
Vallejo
Counties
Solano
Regions
San Francisco Bay Area
State Highways
SR 37, SR 29
Schools
Federal Terrace Elementary School
Waterways
Napa River
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
PRC 21084; 14 CCR 15301(f)
Reasons for Exemption
The scope of work falls within exemption category 1(f) and there are no exceptions
under PRC 21084; 14 CCR 15300 et seq. that would bar the use of this exemption.
County Clerk
Solano
Attachments
Notice of Exemption
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