Thusly US 99 appears on the 1925 Rand McNally Map of California as being routed from Red Bluff south on LRN 7 to Davis and US 40/LRN 6 to Sacramento.
The December 1925 California Highways & Public Works describes the progressing construction of new Sacramento Northern Railroad Subway on LRN 6 in West Sacramento.
The February 1927 California Highways & Public Works features the recently completed M Street Bridge approach in West Sacramento along with the new alignment of US 99/US 40/LRN 6 through the 1926 Sacramento Northern Railroad Subway.
The January 1928 California Highways & Public Works describes US 99 as a single route heading south out of Red Bluff via LRN 7 towards Davis and via a multiplex of US 40/LRN 6 to Sacramento.
The AASHO data base has information pertaining to a request made by the California State Highway Engineer to have US 99 become a split route between Red Bluff south to Sacramento. In a letter dated June 13th, 1928 the rationale for splitting US 99 into an East/West Route was a two-to-one traffic ratio on LRN 3 on the east bank of the Sacramento River compared to LRN 7 on the west bank.
The proposed US 99W/US 99E split can be seen for the first time on this map (which was scanned upside down in the AASHO database).
The US 99 W/US 99E split from Red Bluff to Sacramento was approved by the AASHO on August 6th, 1928.
The first map to display US 99 as a split route south of Red Bluff towards Sacramento can be seen on the 1930 Division of Highways State Map.
The November/December 1964 California Highways & Public Works notes the substructure of the Sacramento River Bridge between W Street and X Street had been completed the previous September.
The January/February 1965 California Highways & Public Works features US 99W/US 40/Interstate 80 traversing the flooded Yolo Basin via the new Yolo Causeway after the Christmas Floods of 1964.
The opening of Interstate 5 between CA 36 in Red Bluff north to Cottonwood is discussed in the January/February 1965 California Highways & Public Works. The new segment of Interstate 5 is cited to have opened on July 2nd, 1964.
The AASHO Renumbering database shows that US 99 was approved to be truncated out of California by the AASHO Executive Committee on June 29th, 1965. This measure would have become effective on New Years Day 1966.
The November/December 1965 California Highways & Public Works cites the new Interstate 80 bridge over the Sacramento River was slated to be complete by summer 1966.
Crossing Capitol Mall at the eastern foot of the Tower Bridge offers an impressive view of the road deck to the west and the State Capitol ten streets to the east.
Heading west along the eastbound lanes of the Tower Bridge offers a view south on Sacramento River towards US 50. There is various signs on the Tower Bridge alerting pedestrian traffic to get off the lift span when the bell from the control station rings.
Looking east towards the Tower Bridge it is hard to envision it as the eastern terminus of the West Sacramento Freeway.
The westbound lanes of the Tower Bridge offer a northward view of the I Street Bridge.
On the south side of the Tower Bridge along the Sacramento River Bike Trail there are several historical placards detailing the history of the structure. There is a historical placard regarding the 1911 M Street Bridge
From the south side of the Tower Bridge a sign stating the operating hours for the control bridge can be observed. The Tower Bridge lift span is surprisingly operated by only two 100hp electric motors.
US 50/Interstate 305 from Interstate 80 east to Exit 3/Tower Bridge Gateway was part of former US 99W/US 40 on the West Sacramento Freeway. As US 50/I-305 eastbound begins traffic is notified that Ocean City, Maryland is 3,073 miles away.
US 50/I-305 east Exit 1 accesses Harbor Boulevard.
US 50/I-305 east Exit 3 accesses Jefferson Boulevard (former CA 84) which in turn is signed as access to downtown Sacramento via Tower Bridge Gateway (former US 99W/US 40). A Interstate 80 Business Loop shield can be found approaching Exit 3.
Part 5; former US Route 99 West on Road 98 in Woodland
The modern western segment CA 16 eastbound enters Woodland as Main Street. Modern CA 16 eastbound in Woodland makes a left hand turn onto former US 99W onto Road 98. Road 98 presently co-signed as CA 16 and Yolo County Road E7.
Oddly former US 99W on Road 98 is also includes Interstate 5 Business signage.
CA 16 east, Yolo County Route E7 north, and I-5 Business all follow Road 98 northward a terminus at Interstate 5 located at Postmile YOL R43.42. Prior to the construction of the Westside Freeway US 99W would have crossed the grade of modern Interstate 5 to County Road 99W at Yolo siding.
Former US 99W crosses under Interstate 5 onto 7th Street in the City of Williams. Approaching downtown Williams Historic US Route 99 West signage can be found on 7th Street.