I was in a highways/freeways of LA mood... pardon me if these have already been posted in this thread.
1949. Looking northeast over northbound Arroyo Seco Pkwy. (then US-6-66-99, now CA-110) at Castelar Street (now Hill Street) off-ramp overcrossing; southbound Arroyo Seco Pkwy. and off-ramp at upper left.
Water & Power Assoc.
June 24, 1958 - Looking southeast over Santa Ana Fwy. (then US-101, now I-5) at Valley View Ave. exit in La Mirada.
Caltrans Archives
1949 - Looking south on newly constructed Santa Ana Pkwy. (US-101) with old 6th St. Viaduct in the background.
Bureau of Public Roads photo
Then and now...
Eastbound Garvey Avenue ((US-60.70/99) at Rosemead Boulevard (CA-19), circa 1950, in what is now South El Monte.
Courtesy of Karl Bangar of Southen California Nostalgic
Eastbound Garvey Avenue at Rosemead Boulevard (CA-19), Friday, 8.12.2022, South El Monte.
Photo by me
September 13, 1957. Facing SW on newly constructed Golden State Fwy (then US-6-99, now I-5) near LA River. Small white sign at center reads "End Freeway 3/4 Mile." Zoo Drive overcrossing in background. This area is now the location of the Ventura Fwy. (CA-134) interchange.
Caltrans Archives
December 11, 1952. A view of what would later become the 134 Freeway in Pasadena, next to the Colorado Street Bridge.
LA Examiner Collection
June 15, 1959. Looking south at newly constructed Golden State Fwy. (US-6-99/I-5) at Los Feliz Blvd. overcrossing. Griffith Park Road, now Crystal Springs Drive, and Los Feliz Blvd. ramps in foreground; Griffith Park at right.
Caltrans Archives
In Orange County... June 24, 1958. Facing northwest on Santa Ana Fwy (then US-101, now I-5) near Sand Canyon Ave. in what is now Irvine. Myford Rd. interchange now Jamboree Road.
CH&PW
Los Angeles, 1939. Two-way traffic on Figueroa St. (then US-6-66-99/CA-11) at Solano Ave. (view NE). Now NB Arroyo Seco Pkwy (CA-110).
Arturo Salazar Facebook
Los Angeles, 1958. Northbound Golden State Freeway (then US-6-99, now I-5) between Colorado Street (then CA-134) and Los Feliz Boulevard.
Arturo Salazar Facebook
Los Angeles, 1958. Southbound Golden State Fwy (then US-6/99, now I-5) between Los Feliz Blvd. and Colorado St. (then CA-134). Griffith Park at right.
Arturo Salazar Facebook
Los Angeles, 1949. Facing northwest at newly constructed Santa Ana "Pkwy" (US-101) at Boyle St. overcrossing; 7th St. overcrossing and 6th St viaduct in background.
BPR photo
Los Angeles, 1946. Facing southwest on newly constructed Ramona Pkwy. (US-60-70-99), now San Bernardino Fwy. (I-10), at Echandia Street pedestrian overcrossing. Pacific Electric tracks at right.
Bureau of Public Roads photo
December 29, 1960. What is now the 110 Freeway looking south towards the 101 Freeway interchange, Los Angeles.
Caltrans Archives