1953 Ferguson map showing I-10/US 87 expressway (in red) and proposed I-35/US 81
(Brian Purcell)

Downtown Y construction (1947)
This is looking southeast approaching the future fork on eastbound I-10. To the left, you can see the construction for the concrete ditch for San Pedro Creek as it curves toward Camaron St.
(TxDOT)

I-10 at the Downtown Y looking east (1951)
The roadway on the left is the exit to today's Santa Rosa Blvd. (N Laredo St. at that time), and the bridge is the overpass leading to westbound I-10 from Martin St. What's now I-35 had not yet been built.
(TxDOT)

I-10 eastbound fork to Santa Rosa St. (N Laredo St. at that time) (ca. 1955)
This photo shows the construction of I-35.
(TxDOT)

I-10 eastbound fork to Santa Rosa St. (N Laredo St. at that time) (1956)
The bridge is the overpass from Martin St. to I-10 westbound.
(TxDOT)

Looking west at I-10 at the Downtown Y (1951)
This photo shows San Pedro Creek, which today is underground at this location. Today's "Finesilver Curve" would be at the right of this photo, and the road at the left is the exit to today's Santa Rosa Blvd. (N Laredo St. at that time.) The bridge in the center of the photo is the overpass leading to westbound I-10 from Martin St.
(TxDOT)

Ramp from I-35 northbound to I-10 westbound (1957)
(TxDOT)

Looking east at the Downtown Y (1967)
(TxDOT)

Eastbound I-10 fork at I-35 (1956)
To the left was the fork to N Laredo St., which today is the exit to Santa Rosa Blvd. To the right was the fork to Martin St. where the expressway originally ended. At this time, the Martin St. fork was closed and work was just commencing to lower the roadway to pass under Martin St. in order to connect it to the new expressway south of there. You can see the completed roadway in the photos below.
(TxDOT)

Eastbound I-10 fork at I-35 (ca. 1960)
Notice the US Highway markers-- this photo was taken just after the Interstates in Texas were designated; it would be a few years before they were signed. The integrated arrows on the US Highway shields was unique to Texas.
(TxDOT)

Eastbound I-10 fork at I-35 (1964)
(TxDOT)

Eastbound I-10 fork at I-35 (1965)
(TxDOT)

Eastbound I-10 fork at I-35 (1972)
(TxDOT)

Eastbound I-10 fork at I-35 (1975)
(TxDOT)

Looking west from the I-10 westbound overpass (1951)
(TxDOT)

Looking west from the I-10 westbound overpass (ca. 1952)
(TxDOT)

Looking northwest from the pedestrian bridge over eastbound I-10 at I-35 (ca. 1956)
(TxDOT)

Construction of I-10 eastbound approaching I-35 (ca. 1949)
(TxDOT)

I-10 eastbound approaching I-35 (ca. 1950)
(TxDOT)

I-10 eastbound approaching I-35 (1952)
(TxDOT)

I-10 eastbound approaching I-35 (1955)
In the distance, you can see the right fork closed for construction.
(TxDOT)

I-10 eastbound approaching I-35 (ca. 1964)
(SABCUTS)

I-10 approaching I-35 (1968)
Note that Commerce St. was still US 90 at this time. The US 90 expressway would open shortly after this photo was taken. The section of overhead sign that's covered next to "SOUTH US 87" is likely a US 90 shield.
(SABCUTS)

I-10 approaching I-35 (1968)
(TxDOT)

I-10 approaching I-35 (1967)
The ditch in the center of the expressway is San Pedro Creek; it's underground at this location today. Notice the construction of the Tower of the Americas at the far left.
(TxDOT)

I-10 approaching I-35 (1975)
(TxDOT)

Looking north over the Downtown Y (1957)
(TxDOT/Jack Amann)

Looking south over the Downtown Y (1957)
This was shortly after completion of the elevated "Central Expressway" between Martin St. and Guadalupe St., which connected the previously-completed expressways to the north and south. Prior to that, traffic used a pair of one-way surface streets (Pecos St. and San Saba St.)
(TxDOT)

Looking southeast over the Downtown Y (1957)
(TxDOT)

Over the Downtown Y looking north (ca. 1960)
Notice the lack of direct connectors to northbound I-35 and from southbound I-35. Instead, traffic used the access roads and regular entrance and exit ramps until direct connectors were built around 1967.
(TxDOT)

Over the Downtown Y looking northeast (ca. 1960)
(TxDOT)

Looking east over the Downtown Y (ca. 1960)
You can see I-35 near Ft. Sam Houston under construction near the top left.
(TxDOT)

Looking east over the Downtown Y (ca. 1967)
At the center-right, you can see the then-new cloverleaf built to connect eastbound I-10 to northbound I-35. It was removed around 1990 and replaced with the flyover that's there today.
(SABCUTS)

Looking northeast at the Downtown Y (1971)
In the center is the original "Finesilver Curve".
(TxDOT)

Looking northwest over the Downtown Y (ca. 1976)
(SABCUTS)

View of the Finesilver Curve (I-35 southbound to I-10 westbound) (ca. 1976)
(SABCUTS)

Over the Downtown Y looking west (ca. 1989)
In this photo, you can see the old cloverleaf from eastbound I-10 to northbound I-35 and construction of the flyover that would replace it.
(TxDOT)

Looking northwest at the Downtown Y (ca. 1989)
(TxDOT)

Looking southwest over the Downtown Y (ca. 1990)
(TxDOT)