Interstate 69 in Indiana
The original plan (in a DEIS prepared by INDOT in 2004, but later dropped) was for I-69 to leave the now-former I-164 alignment somewhere just east of Green River Road (exit 3) and head south (instead of turning west with I-164) for approximately before crossing the Ohio at a point near the mouth of the Green River. This portion of the route had not then been funded, as construction of the new Ohio River crossing and its approaches in both states was expected to cost approximately $800 million. Indiana and Kentucky officials had said construction on the new Ohio River Bridge would not begin until at least 2020, after two new crossings near Louisville were completed. With Indiana then preparing to break ground on SIU 3, Kentucky officials indicated that collecting tolls might be the only feasible option for completing the I-69 bridge, as traditional federal and state funding for such projects were drying up. , neither Kentucky nor Indiana officials had yet come up with the money to plan and construct this I-69 bridge.
Interstate 805
In May 1967, bidding began, after construction had been delayed by that of the I-5 and I-8 freeways, both of which had been given higher priority. This first portion would run from Wabash Boulevard to around Madison Avenue (a distance of ), and the next portion would include the I-8 interchange. The R.E. Hazard and W.F. Maxwell Companies won the low bid of $11.7 million (equivalent to $ in ) in mid-1967. The groundbreaking ceremony happened on September 25 at El Cajon Boulevard and Boundary Street. In August 1968, the portion of I-805 from just south of I-8 to north of Friars Road, including the interchange with I-8, was put up for bidding; at a budgeted $27.5 million (equivalent to $ in ), it was the most expensive job that the Division of Highways had ever put up for bid. The winning bid was $20.9 million (equivalent to $ in ), and was awarded to R.E. Hazard Contracting Company and W.F. Maxwell Company.
Construction had begun on the viaduct by May 1969; in the meantime, National City was making plans for developing the freeway corridor with motels and restaurants, as well as a shopping center. In mid-1969, bidding was to begin on of I-805 from north of Friars Road to north of what was then US 395, which would become SR 163. Construction from J Street south to near San Ysidro was underway by September, when there were concerns that an order from President Richard Nixon to reduce federal construction projects by 75 percent might affect funding for the portion north of Friars Road. However, Governor Ronald Reagan lifted the associated freeze in construction at the state level a few weeks later. A month later, the contract for the portion between Friars Road and US 395 had been awarded for $15 million (equivalent to $ in ); the portions between there and north of Miramar Road were in the planning phases, while construction continued south of I-8 to Wabash Boulevard. The portion from SR 52 to Miramar Road had been contracted out to O.G. Sansome Company for $5.6 million (equivalent to $ in ) by the end of 1969. Meanwhile, $4 million (equivalent to $ in ) of state funding was spent in 1969 to find housing for those who were to be displaced by the freeway in San Ysidro.