29 Napa Roundabouts
In partnership with the City of Napa, Caltrans will be constructing three roundabouts on northbound State Route (SR) 29 ramps and City of Napa in the vicinity of First Street and California Blvd., converting the existing traffic signals and stop signs to roundabouts. In addition, a permanent reversal of the current direction of one-way streets (First and Second) will be implemented, east of SR 29 to Jefferson Street.
The project proposes to construct one roundabout at the intersection of the northbound SR 29 (SR 121) off ramp at First Street, another at the intersection of First Street and California Blvd., and a third roundabout at the intersection of second Street and California Blvd. The direction of one-way traffic on First Street will be changed eastward towards Jefferson Street and Second Street will be changed going westward towards SR 29, from Jefferson Street.
Project limits span into both the Caltrans and the City of Napa rights of way. The work extends out to all northbound SR 29 on and off ramps and approximately 400’ north of First Street, 400’ south of Second Street, and eastward out to Jefferson Street.
The project is the result of a unique and complex cooperative work between Caltrans and the City of Napa to combine the Caltrans project (one roundabout) with the City of Napa project (two roundabouts), in an effort to reduce public inconvenience, and to eliminate waste of design and construction resources.
Construction work began in early June of 2019 and is expected to last until end of 2020.
Effect on traffic
Traffic delays should be expected during construction of the roundabouts due to construction staging requiring several changes to traffic patterns. Currently, the contract plans indicate reconfiguring traffic patterns 12 times.
Bicycle traffic will be sharing the main traffic lanes within the project limits.
There are provisions for pedestrians to pass through construction area.
Please note: The contractor may decide to construct the project using different staging scheme(s).
From 8 pm to 7 am the noise from construction activities must not exceed 86 dBA Lmax at 50 feet.
Within the City of Napa right of way, construction activities are limited from 7 am to 7 pm, Monday through Friday and 8 am to 4 pm on weekends or legal holidays.
Caltrans and Partners Break Ground Monday on First Roundabouts in Napa Valley, Located on SR-29
Caltrans Partners with City of Napa and NVTA Agencies Work Together on Safety Improvements
NAPA—Caltrans, the City of Napa and the Napa Valley Transportation Authority (NVTA) today hosted a groundbreaking celebration for the Napa roundabouts project.
In partnership with the City of Napa, Caltrans will construct three roundabouts on northbound State Route 29 (SR-29) in the City of Napa in the vicinity of First Street and California Boulevard, converting the existing traffic signals and stop signs to roundabouts.
“This project is part of Caltrans’ statewide efforts to reduce congestion and improve safety and mobility for the state’s residents,” said Doanh Nguyen District 4 Director Doanh Nguyen. “The beauty of roundabout design is that it reduces the entry speed into intersections, which in turn reduces the severity of collisions and keeps traffic flowing, cutting down congestion.”
The director also noted that the roundabouts will accommodate pedestrians via sidewalks. The project will construct one roundabout at the intersection of the northbound SR-29/SR-128 off ramp at First Street, another at the intersection of First Street and California Boulevard, and a third roundabout at the intersection of second Street and California Boulevard.
The direction of one-way traffic movement on First Street will be changed eastward towards Jefferson Street and Second Street will be changed going westward towards SR-29, from Jefferson Street.
Three agencies – Caltrans, NVTA and the City of Napa – worked together to make the roundabouts possible.
First Street and California Boulevard in Napa Traffic Light to be Removed First Week in September For Roundabout Construction
(NAPA)—Caltrans has scheduled to remove the traffic signal light at the intersection of First Street and California Boulevard in Napa the first week of September to accommodate construction on one of three roundabouts west of downtown Napa.
When the signal light is removed, California Boulevard at First Street will be closed, re-opening by late December. Detours will be in place. Motorists should expect delays and exercise caution during the road closure.
During the closure, motorists driving eastbound on First Street from State Route 29 (SR-29) will be able to make a right turn on California Boulevard going south to get to Second and Third streets. All traffic traveling eastbound will be able to make a right turn on California going south.
California Boulevard southbound will turn left at Clay Street then right at Seymour Street, then right at Third Street. Detour ends at California Boulevard.
California Boulevard northbound will turn right at Second Street, then left at Seymour Street, then left at Clay Street and detour ends at California Boulevard.
First Street westbound will turn right at Walnut Street and detour ends at Clay Street.
The removal of the signal light is part of ongoing construction of three roundabouts planned west of downtown Napa, with the work expected to conclude in 2020.
The northbound First Street onramp is expected to re-open in the fall.
Extended Closure of SR-29 Northbound Onramp From Northbound First Street in Napa And California Boulevard Lane Reduction
(NAPA)—Caltrans is scheduled to close the northbound First Street onramp to northbound State Route 29 (SR-29) in downtown Napa this week, lasting approximately through August 30.
The ramp is scheduled to close at 8:00 AM Wednesday, June 19, remaining closed until August 30 of this year to accommodate construction at the northwest corner of the intersection of First Street and California Boulevard in Napa.
A detour will be in place to help motorists on northbound First Street to get onto the onramp to northbound SR-29. Detour signs will be in place to guide traffic to the detour.
Also, southbound California Boulevard at Second Street will be reduced from two lanes to one lane to accommodate construction at the northwest corner of California Boulevard and Second Street. This lane reduction will begin at 8:00 AM Wednesday, June 19, and will be in place up until early fall of this year.
The purpose of the ramp closure and the lane reduction is to accommodate construction on one of the three roundabouts that will be installed in the project. Work on the three roundabouts is expected to conclude in 2020.
You may contact Caltrans with any questions or concerns about the project as follows:
Janis Mara, Public Information Officer