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This was part of I-5W, which started at I-5/I-580 south of Stockton, followed I-580 to I-80 in Oakland, paired with I-80 east until I-505, and then reunited with I-5 where I-505 does now. I-580 and I-505 were signed with their current numbers around 1964 (although they were submitted and approved by AASHTO in 1947). Note that a 1968 map shows no freeway for I-505.
In 1963, Route 505 was defined as “Route 80 near Vacaville to Route 5 near Dunnigan”, and it retains its 1963 definition. Before 1972,
it was signed as Temporary I-505, and was a two lane road between
Vacaville to Dunnigan. The freeway was constructed in sections: beginning
with the interchanges at Route 16 and Route 128 (far in advance of any
other part of the freeway). These interchanges (actually two sections of
constructed freeway: A 2 mile section at the junction of Route 128, and a
1 mile section at Route 16) were part of a 1957-58 project that relocated
the section of then-LRN 90 about a half-mile east of its original route
that followed the SP Rumsey branch line that extended north of Vacaville
to Madison before turning west along Route 16 to Rumsey (the Cache Creek
valley was noted for hop production). The relocation extended between
south of Winters and north of Madison and included segments angling back
to the original alignment. It was constructed as a 2-lane expressway, with
short 4-lane freeway segments through the Route 16 and Route 128
interchanges. There were no I-5W shields erected on that portion of the
route; signage simply indicated "Redding" for NB and "San Francisco" for
SB. The next segment completed was the connection between Route 16 and
Route 128; then the segment from I-5 to Route 16; and finally the segment
from Route 128 to I-80. The freeway was completed by 1977.
(Source: Some of this (namely the history of the first interchanges) is based on a post by Scott Parker (SParker) in "Re: I-505" on 2/25/2019)
Note: There was once a proposal to connect I-580 with I-505 called the Mid-State Tollway. As some surmised the Mid-State Tollway might be a rerouting of Route 84, the Mid-State Tollway is discussed with Route 84.
This route was LRN 90, defined in 1933. It appears to have been unsigned before 1964.
In 1956, public meetings were held on a proposed freeway routing for LRN 90 between US 40 (I-80) and US 99W (I-5). The improvement project was
estimated at $4.975 million. The map shows that Winters Road (County Road
89) was LRN 90 (unsigned) prior to the freeway routing, and that County
Road 89 continued N beyond Madison to rejoin the original LRN 90 routing.
(Source: Unnamed Publication, 1956 via Joel Windmiller 2/14/2023)
The SAFETEA-LU act, enacted in August 2005 as the reauthorization of TEA-21, provided the following expenditures for this route:
Vaca Valley Parkway (~ SOL R1.422) and I-505 Multimodal Improvement Project
In April 2021, it was reported that Solano County has
submitted the Vaca Valley Parkway (~ SOL R1.422) and I-505 Multimodal
Improvement Project for federal Community Project Funding. It is part of a
list of projects that will go to Rep. John Garamendi, D-Walnut Grove, and
Rep. Mike Thompson, D-St. Helena, to be included among the 10 projects
each can request for the earmark dollars. The House of Representatives
recently in 2021 to bring back the practice of earmark spending, which
allows for individual representatives to direct spending to their
districts to pay for special projects or programs. The practice had been
banned since 2011, largely due the criticism that it lends itself to
wasteful “pork barrel” and “special interest”
(Source: Solano Daily Republic, 4/7/2021)
In January 2022, it was reported that the $16 million
project was closer with the passage of the 2021 Infrastructure Bill.
Approximately $10 million is earmarked from local government, $2 million
from Congestion Mitigation and Air Quality Improvement funds, and the
final $4 million from the federal “Infrastructure and Jobs
Act.” The I-505/Vaca Valley Parkway Corridor Multi-Modal
Improvements Project is planned to ease the movement of goods from
industrial and manufacturing centers, improve safety and promote
environmental sustainability, according to project officials. The intent
is to also accelerate commercial and industrial development, accommodate
job growth and housing productions, and to provide alternative
transportation access for Vacaville residents.Proposed improvements
include three roundabouts on Vaca Valley Parkway to promote continuous
moving traffic and a separate bicycle/pedestrian bridge that will connect
the east and west sides of I-505. The last time the county improved
infrastructure like this was the Solano Water Project and the building of
the dam at Lake Berryessa.
(Source: Solano Daily Republic, 1/7/2022)
In April 2007, the CTC considered relinquishment of right of way in the county of Yolo, at County Road 24 (~ YOL 9.547), consisting of reconstructed and relocated county roads and frontage roads.
The interchange of I-80 and I-505 in the County of Solano (~ SOL R0.097) is
named the "Lieutenant Colonel James C. Warren Memorial Interchange".
was named in memory of Lieutenant Colonel James C. Warren, who was born in
August 1923 into the racially segregated community of Gurly,
Alabama.Warren left the region at the age of 15 years, when his mother
sent him to Island Park, Illinois, where he attended high school.
Enlisting in 1943 to preflight with the Tuskegee Airmen, the all black
United States Army Air Force unit that distinguished itself in combat
during World War II, Lieutenant Colonel Warren was assigned to
Indiana’s Freeman Field, where, after being eliminated from pilot
training, he completed navigator training, through which he qualified as
both a navigator and a bombardier. Lieutenant Colonel Warren was one of
the 101 black officers at Freeman Field in 1945 who were arrested and
charged with mutiny because they refused to comply with base regulations
excluding black officers from a base officers’ club. The service
records of Lieutenant Colonel Warren and the other 100 officers were
cleared by the Air Force in 1995, an action that was announced that year
during a convention of the Tuskegee Airmen. After serving with the 477th
Bombardment Group of the Tuskegee Airmen, Lieutenant Colonel Warren spent
35 years with the United States Air Force, for which he flew 173 combat
missions in Korea and Vietnam, earning such esteemed commendations and
decorations as the Congressional Gold Medal, Distinguished Flying Cross
with two Oak Leaf Clusters, and Air Force Commendation Medal, among
numerous others. A University of Nebraska graduate who ultimately became
the oldest individual to earn a pilot’s license at the age of 87
years, Lieutenant Colonel Warren distinguished himself through his
community leadership and participation in the Nut Tree Airport’s
Young Eagles program, as well as his membership with the Jimmy Doolittle
Air and Space Museum Foundation, the Kappa Alpha Psi Fraternity, and
Tuskegee Airmen Incorporated. Named by Senate Concurrent Resolution (SCR)
24, Res. Chapter 108, Statutes of 2015, on July 16, 2015.
(Image source: Solano Daily Republic)
The segment of I-505 between the
I-80 interchange (SOL R0.0) and the Vaca Valley Parkway (~ SOL R1.422) in
the County of Solano is named the CHP Officer Kirk Griess Memorial
Highway. It was named in memory of Kirk Anthony Griess, born in
July 1972 in Robbinsdale, Minnesota. After graduating in 1990 from
Wahpeton High School in North Dakota, Kirk started his life of service at
18 years of age, enlisting in the United States Marine Corps, proudly
serving for four years, including a deployment to Japan, and earned the
rank of Corporal before his discharge in 1994. Officer Griess graduated
from the California Highway Patrol Academy and worked in the Oakland and
Contra Costa offices, finally settling in the Solano office where he
worked for 16 years. He was active in the community of Vacaville where he
coached his kids’ youth soccer and baseball teams. On August 10,
2018, while conducting a traffic stop on westbound I-80 east of the Manuel
Campos off-ramp, Officer Griess was struck and killed by a distracted and
reckless driver. Named by ACR 4, Chaptered 07/08/19, Res. Chapter 105, Statutes of 2019.
(Image source: Solano Daily Republic, California Assn of Highway Patrolmen)
Approved as chargeable Interstate on 7/7/1947; Freeway. In August 1957, this was tentatively approved as I-5W. In November 1957, the designation I-7 was proposed as part of the first attempt to give urban routes numbers (there were no 3-digit routes at the time). In April 1958, it was proposed to be designated I-115 as part of the first attempts to assign 3-digit numbers. It was finally approved as I-5W, and later renumbered as I-505.
[SHC 253.1] Entire route. Added to the Freeway and Expressway system in 1959.
Overall statistics for Route 505:
Acronyms and Explanations:
Route 480 Route 580
© 1996-2020 Daniel P. Faigin.
Maintained by: Daniel P. Faigin <email@example.com>.