U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
The historic structures and historic context of the highway are a major constraint in terms of meeting current design criteria. Caltrans concluded that the impacts to these historic elements would not be acceptable. In addition, a channelized river, the Arroyo Seco, parallels SR 110 on the east, constraining the available cross-sectional width on that side (Figure 117). Development adjacent to the highway and the interchanges further constrains major geometric improvements in some locations.
The Arroyo Seco Channel runs adjacent to the Parkway, constraining its width on one side.