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State Route 275

Click here for a key to the symbols used. An explanation of acronyms may be found at the bottom of the page.

Routing Routing

Rte 275 - Tower BridgeTower Bridge from the west side of the Sacramento River near the City of West Sacramento to the east side of the Sacramento River near the City of Sacramento.

Post 1964 Signage History Post 1964 Signage History

Post-1964 Legistlative Route Graphic In 1967, Chapter 1350 defined Route 275 as “Route 80 near West Acres Road west of Sacramento to the junction of Capitol Avenue and Ninth Street in Sacramento. No funds in the State Highway Fund shall be used for the construction or maintenance of any further aesthetic improvements on that portion of the route in the City of Sacramento.” This routing of Route 275 was planned as a realignment of Capitol Avenue. When I-80 was built, the old route was removed from the state highway system, except for Route 275, which the legislature specifically asked the highway department to keep until they could decide whether this would be permanent (1966 Senate Concurrent Resolution 17, chapter 94, p. 872).

In 1972, Chapter 1216 changed "West Acres Road" to "Westacre Road".

In 1981, Chapter 292 changed "Route 80" to "Route 50", reflecting the renumbering of routes in Sacramento.

In 1996, Chapter 1154 deleted the route. According to the maps from District 3, it is not yet decomissioned.

In 2010, Chapter 421 (SB 1318, 9/29/10) added the route back, but just as the Tower Bridge. At 738 feet long, it is the shortest state highway in California.

According to the Caltrans GIS database in 2023, there is also a segment in W. Sacramento, from PM 11.7 to 12.04, with both an L and an R suffix, that is disconnected from the bridge portion and not yet relinquished. It constitutes the ramps from US 50 to Jefferson Blvd along the Tower Bridge Gateway.

Pre 1964 Signage History Pre 1964 Signage History

This was part of LRN 6, defined in 1909. It was one routing of old US 99W/US 40.

The M Street Bridge was originally constructed as a railroad swing structure in 1911. The M Street Bridge was utilized by the Sacramento North Railway, Oakland Antioch & Eastern Railway and Northern Electric Railway.  The construction of LRN 6 and the Yolo Causeway saw roadway lanes added to the M Street Bridge as part of the realignment of the highway. In 1925, a fire that destroyed the existing Sacramento Northern Railroad Subway on LRN 6 in West Sacramento, and bids were put out by the State to construct a new subway and eliminate a blind curve. By 1927, the subway had been completed and it connected to a completed M Street Bridge approach in West Sacramento, providing a new alignment of US 99/US 40/LRN 6 through the 1926 Sacramento Northern Railroad Subway. In 1934, the Tower Bridge (future Route 275) opened. The Tower Bridge was a direct replacement for the previous M Street Bridge.  During the process of construction of the Tower Bridge the M Street Bridge was removed and US 99W/US 40/LRN 6 crossed the Sacramento River via a temporary structure.  Unlike the swing design of the M Street Bridge, the design of the Tower Bridge features a vertical lift span. 
(Source: Gribblenation Blog (Tom Fearer), "Former US Route 99 West from West Sacramento to Red Bluff", August 2021)

The M Street Bridge was built in 1911 and was a swing-through truss railroad bridge owned by the Sacramento Northern Railway. The M Street bridge had a superstructure composed of triangular units known as trusses, and could be rotated horizontally to allow the passage of maritime traffic on the Sacramento River below. The M Street Bridge was later modified to also allow motor vehicles to travel across it. Nine-foot roadway sections were added as cantilevered sections on both sides of the existing rail bridge. Sacramento’s population more than doubled between 1910 and 1935, and by the early 1930s, the M Street Bridge was inadequate for the ever-growing volume of automotive traffic. In 1933, the city realized that it needed a better crossing over the Sacramento River.
(Source: Freightways Classic, 7/20/2022)

Beginning on December 22, 1933, the State of California, Sacramento County, and the Sacramento Northern Railway held meetings to plan the new bridge. An agreement was reached among the parties on March 8, 1934. Under the terms of that agreement, Sacramento Northern Railway gave up its rights to the M Street Bridge in return for the rights to rail traffic over the new bridge until March 21, 1960 (the original expiration date of its franchise to operate rail traffic over the M Street bridge). The new bridge was designed as a span-driven vertical lift bridge. This bridge type is movable – designed for areas through which large ships travel on a regular basis. A vertical lift bridge’s span can be elevated vertically while remaining parallel with the structure’s deck. The bridge’s towers are 160 feet high. From east to west, the bridge consists of a 30-foot-long girder span, a 167-foot long eastern truss approach span, a central lift span that is 209 feet long, a 193-foot-long western approach span and four 34-foot-long girder spans. With the draw up, there is “100 feet of vertical clearance above high water with a 172-foot-wide navigation channel between the timber pier fenders.” The bridge’s lift span weighs 1,040 tons; however, the use of an equal amount of counterweights (which are located in each tower) allows the span to be operated with two relatively small 100-horsepower electric motors. The bridge was initially designed with a 52-feet wide roadway with sidewalks, with single lanes for vehicles that flanked the 13-foot center lane for rail traffic. The bridge was designed under the guidance and supervision of architect Alfred Eichler. He developed the bridge’s appearance, which bridge engineers then designed. Eichler’s design elements included completely hiding the bracing on the tower posts by using decorative solid metal panels. These panels also hide the counterweight and the counter chains. The faces of the towers have an ‘x-bracing’ that has been carefully designed so that from the exterior, a flat surface is visible, hiding the flanges and webs of the actual bracing. The top of the tower face has vertical openings. The very tops of the tower are capped with steel that hides most of the sheaves and matches up with the other covers on the towers. The bridge’s tender house doubles as the machinery room and is a low-lying structure with a decorative cupola positioned on top of the lift span. The lift span and approach truss spans are distinguished by a minimalized use of lattice and v-lacing. The other key distinguishing feature in the trusses is the portal and sway bracing that is a unique arched design. Original ornate riveted lighting is present on the bridge. The approaches to the bridge have two pairs of concrete pillars, with the outermost pair bearing a casting of ‘1935’ at the top.
(Source: Freightways Classic, 7/20/2022, utilizing material from the page on the Tower Bridge at

Construction of the bridge began on July 20, 1934 and it was finished less than 18 months later. On November 7, 1935 the first train crossed the Tower Bridge. On Sunday, December 15, 1935, California Governor Frank F. Merriam dedicated the bridge. The bridge was formally accepted by the state on January 11, 1936. Tower Bridge was the first vertical lift bridge in California’s highway system. The bridge’s railroad tracks were removed in 1963. Following their removal, the roadway was renovated to four lanes of automotive traffic. Because of the nearby railroad tracks, the bridge’s east grade crossing is designed as a secondary barrier to exclude vehicular traffic while the bridge is raised. When the warning siren sounds, the crossing activates, blocking traffic until the bridge is safe for use. From 1963 until 2007, the bridge was used for pedestrian and vehicle traffic only. In 2007, the area’s regional transportation agencies considered adding trolley traffic across the bridge. However, no action was taken until 2020, when those plans were changed. On September 15, 2020 the board of directors of the Sacramento Regional Transit District voted in favor of using Tower Bridge to extend the light rail system to provide service to West Sacramento.
(Source: Freightways Classic, 7/20/2022)

Note: the Gribblenation Blog, "Highways in and around Old Sacramento; US 40, US 99W, CA 16, CA 24, CA 70, CA 99, CA 275, and more" provides a detailed history of the various highways (US 40, US 99, Route 16, Route 24, Route 70, Route 99, Route 275, Route 51, I-5, and I-80 in the Old Sac area.

Status Status

In December 2003, after much of the route was deleted from the system, CalTrans construction signage at the corner of 3rd Street and West Capitol Avenue advised motorists to "Use SR 275" due to road work on West Capitol Avenue. It is likely that, although unsigned, the route has not yet been relinquished. The Tower Bridge is part of the riverfront revitalization in that area, and will likely be getting significantly wider sidewalks. The goal is to have promenades and trails lining both sides of the river, from Lighthouse Marina to Stone Lock in West Sacramento; from Discovery Park to Miller Park in Sacramento. There would be a deck over I-5 on the Sacramento side to reconnect the city to the riverfront.

Non-Bridge Portions

According to Chris Sampang, the portion of Route 275 that was part of the West Sacramento Freeway (from US 50/Route 84 east to the Tower Bridge near Raley Field) was reliniquished in 2001, five years after decomissioning, in order to convert several interchanges (3rd Street/West Capitol Avenue, 5th Street/West Capitol Avenue) into intersections. No work has begun on this however. The route, however, remained in the state highway code post-decomissioning (explaining why the lone Caltrans sign on West Capitol near Raley's Supermarkets headquarters mentions the highway). The Capitol (Avenue) Mall portion of Route 275 (from the I-5 overpass east to 9th Street, where US 99W, Route 16, and US 40 used to turn right to hit up N Street) was relinquished in 1999 to the city of Sacramento, and the only signs of former state maintenace are the old gantries for Route 99/Route 70/Route 16 and I-5 present in the area. There are plans for 5th Street to be extended S across the Route 275 West Sacramento Freeway as part of future improvements (and development in the Triangle area, the space between South River Road, Route 275, and US 50 where Raley Field is located). This will likely come with the downgrading of access control for the old freeway.

According to the Sacramento Bee, construction on the downgrading of former Route 275 will likely begin in 2005 with the removal of the Riske Lane interchange (Riske Lane will be renamed Garden Street afterwards); the money used for this project will be from local development funds. The removal of the interchanges at 3rd Street/South River Road and 5th Street will occur in 2008, after the old railroad line at the South River Road exit is removed. This will provide for more access to the Triangle/Raley Field area.

In July 2006, West Sacramento initiated the Tower Street Gateway project. This relates to the two-mile stretch of former Route 275 running through West Sacramento, dividing three neighborhoods and making it a challenge to get around town. The city plans to turn former Route 275 (which acts as a freeway on-ramp connecting Route 50 and Tower Bridge) into an arterial boulevard with three traffic lights. In early August 2006, the city advertised for bids to construct the first phase of the project, involving tearing down the Riske Lane freeway overpass and installing a signal. Construction is expected to begin in Fall 2006. The city believes that by transforming the old highway into a boulevard the city will become more accessible to residents and visitors who might otherwise drive quickly past it.. Route 275 divided three neighborhoods -- Washington, the Triangle, and West Capitol Avenue and the downtown -- from one another. All three areas are in the midst of "aggressive urban revitalization. Work to better link the neighborhoods will begin at Riske Lane. That road will become Garden Street and ultimately link West Capitol Avenue to a future network of streets south of the Tower Bridge Gateway. About half the cost of the first phase of the project, or $3 million, will be paid for by a Community Design Program grant from the region's transportation planning agency, the Sacramento Area Council of Governments. The balance will be paid with redevelopment agency money and some federal funds. The project's second, and final, phase calls for stoplights on the Tower Bridge Gateway at the intersections of 3rd and 5th streets. Third Street goes under the gateway and, like Riske Lane, plans call for making that an intersection, too. The second phase is contingent upon funding.

According to Chris Sampang, as of January 2011, construction work has begun on the reconstruction of the Tower Bridge Gateway (former West Sacramento Freeway) - the old overpass crossing 3rd Street near Raley Field has now been demolished.

However, not all has been relinquished yet. In March 2005, the CTC considered relinquishment of a portion of Route 275 right of way in the City of Sacramento. They considered it again in April. And again in July 2005, together with a financial SHOPP project: In Sacramento at the east abutment of the Tower Bridge to 9th Street. Relinquish highway to the City of Sacramento.

In July 2010, the CTC approved for future consideration of funding a project that would convert the Tower Bridge Gateway (formerly Route 275) from a freeway to a city street from the Union Pacific Railroad (UPRR) Underpass to the Tower Bridge, a length of 1,700 feet. The project will remove the Third Street Undercrossing and will provide new, at-grade, signalized intersections at Fifth Street and Third Street. Impacts and mitigation measures related to areas of earth, air quality, water resources, plant life, animal life, noise, light and glare, land use, hazards, circulation, public services, energy, utilities, human health, and aesthetics were implemented by the City. The project is estimated to cost $8,789,000 and is programmed with SLPP ($1,000,000) and Local ($7,789,000) funds. Construction is estimated to begin in fiscal year 2009/10. On June 10, 2010, the City confirmed that the project scope in the MND as modified by the addendum is consistent with the project scope programmed by the Commission.

Note that the segment from Jefferson Street W to US 50 remains part of Route 275.

Tower Bridge

According to Joe Rouse, the bridge itself will remain owned and operated by Caltrans. Before Route 275 was re-created in 2010, the notion was that as legislatively Route 275 wouldn't exist anymore, the bridge may not carry a route number (which would make it an anomaly in the system once the relinquishment of the highway on either side is complete). It is unclear if the bridge is currently signed.

In July 2014, it was reported that Caltrans was looking again to give away the Tower Bridge. As of July 2014, Sacramento owned the portion of Capitol Mall that leads to the bridge on the east, and West Sacramento owned the portion of the Tower Bridge Gateway that leads to the bridge on the west. The state only owned the 737-foot bridge. Giving up the bridge was actually Caltrans' idea. The organization sent letters to both cities making the offer, citing permit red tape. Caltrans is offering to complete an $8.5 million restoration project on the bridge fenders and maintain it for five years after the cities take control. Sacramento will vote on a memorandum of understanding to continue negotiations in late July 2014, while West Sacramento isn't close to anything formal yet. An agreement would have be reached between both cities to operate and maintain the bridge. The earliest local jurisdictions would take control of the bridge is 2018, and local funds wouldn't be needed until at least 2023. Annual operating and maintenance costs are about $400,000.
(Source: ABC News 10, 7/22/14)

In March 2016, the CTC approved for future consideration of funding a project in Yolo County that will remove and replace the fender system surrounding Pier 6 and Pier 7 of the Tower Bridge on Route 275 between the cities of West Sacramento and Sacramento. The project is programmed in the 2014 State Highway Operation and Protection Program. The total estimated cost is $10,821,000 for capital and support. Construction is estimated to begin in Fiscal Year 2017-18. A copy of the MND has been provided to Commission staff. The project will result in less than significant impacts to the environment after mitigation. The following resource areas may be impacted by the project: biological resources, cultural resources, hazardous materials, and water quality. Avoidance and minimization measures will reduce any potential effects on the environment. These measures include, but are not limited to, the use of sound attenuation devises, environmental awareness training for all construction personnel, new fender replacements matched with the design and appearance of the old fenders, appropriate BMPs for water pollution prevention, and the implementation of an approved Water Pollution Control Program. As a result, an MND was completed for this project.

In October 2018, it was reported that a $6 million project has started on the Tower Bridge. The 82 year old is sagging: Bridge inspectors last year noticed the cables that help lift the main span for tall ships have stretched 14 inches longer than they once were – a sign that time, weather, and stress have taken a toll. A project has started to replace the cables. The project, which includes a handful of other upgrades, continues through December 2018 and is requiring daily traffic-lane reductions and several full-bridge nighttime closures. The work focuses on cutting and replacing, one at a time, 96 steel cables that connect the lift deck to two 1 million-pound counterweight blocks that are suspended high inside each of the span’s twin towers. Those counter-weight blocks slowly lower, via a second cable system, as the bridge deck rises, providing a weight balancing role. The state could have let the cables remain as is, but took action partly because officials feared potential deterioration inside the nearly 2-inch-thick cables. The project work includes redoing electrical cables and lights, and upgrading security and communications systems. The bridge is owned by Caltrans and sits on Route 275, the shortest highway in California, running from one end of the bridge to the other. The state relinquished the rest of that highway more than a decade ago to West Sacramento on one side and Sacramento on the other.
(Source: Sacramento Bee, 10/29/2018)

In the Summer 2019 issue of Mile Marker, it was reported that Caltrans is also planning repairs to the Tower Bridge, opened in 1935. In addition to the earlier work, an emergency contract is awaiting approval to replace the main mechanical drive system, electrical control system, add back-up controls, and replace worn bearings and balance chains. Caltrans expects to spend another $5 million overall on the Tower rehabilitation effort. The Tower Bridge is a verticle lift bridge (one of three in the system) that sees 16,500 vehicle trips daily (on average).
(Source: Summer 2019 Mile Marker)

Naming Naming

The portion of former Route 275 that extends from the end of the Sacramento River Bridge in the City of Sacramento to the junction of Capitol Avenue and Ninth Street in Sacramento is officially named the "Capitol Mall". Named by California Government Code §8167. (March 1977)

The freeway (formerly the easternmost segment of the West Sacramento Freeway) has officially been renamed the "Tower Bridge Gateway" although no signs exist yet to this effect. It was probably renamed by local ordinance.

According to research done by Chris Sampang, the name "Capitol Avenue" was first used on October 26, 1940. Previously, the street was "M Street".

Named Structures Named Structures

Bridge № 22-0021, over the Sacramento River between Sacramento and Yolo counties, was called the "Tower Bridge". It was built in 1934. In 2002, a public input campaign was conducted to determine what color to repaint the bridge. The candidate colors were gold, green, and burgundy. More than 42,000 Sacramento residents chose the color gold, and the painting will be completed in 2003.

Other WWW Links Other WWW Links

Status Status

This routing was never signed. It is constructed to freeway standards from Route 50 to the Tower Bridge.

Classified Landcaped Freeway Classified Landcaped Freeway

The following segments are designated as Classified Landscaped Freeway:

County Route Starting PM Ending PM
Yolo 275 11.70 13.01

Statistics Statistics

Overall statistics for Route 275:

Pre-1964 Legislative Route Pre-1964 Legislative Route

In 1959, Chapter 1062 defined LRN 275 as “[LRN 26] to [LRN 190] near Mountain View Avenue” This was a transfer of the former Colton-San Bernardino connection from LRN 26. This was part of the 1963-1965 definition of segment (a) of Route 18, from I-10 to (then) Route 30 (present-day Route 210) near Mountain View Avenue.

Acronyms and Explanations:

Back Arrow Route 274 Forward Arrow Route 276

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