I sent off an e-mail to the city attorney and received this in reply:
Originally Posted by bitingduck
The prohibition of pedestrians and bicyclists on the Del Amo extension between Crenshaw and Maple was a condition placed on the project due to a risk assessment that analyzed the flares located on the southern edge of ExxonMobil's property that are adjacent to the Del Amo extension that was conducted as part of the Environmental Impact Report. The Environmental Impact Report can be found on the City's website at http://www.torranceca.gov/9980.htm
The EIR can be found at the bottom of the page under Agency Contact. The flaring is discussed on pages 156 - 157 (EIR page numbers 3.8-7 to 3.8-8) and page 160 (EIR page number 3.8-12). A flaring event creates serious thermal hazards to any pedestrians and bicyclists that would be present on the Del Amo extension during the flaring event. Based upon these risks to pedestrians and bicyclists and in order to protect their safety, the project was conditioned to have no pedestrians or bicycles on the Del Amo extension between Crenshaw and Maple.
If you review that document, you'll see that they recommended prohibiting bike traffic on only one side of the road, not both. And there is no indication that it is an expressway.
I pointed this out to the attorney who sent the response, but they're out of the office until later next week. I'll let you know the scoop.