Apparently this is the first subway-responsive light sculpture!
According to Hoodline, "The privately-funded Lightrail is being presented by Illuminate the Arts, the same folks behind the popular Bay Lights installation on the Bay Bridge. The project received preliminary approval from the SF Arts Commission in December, and is now winding its way through various city agencies.
One such agency is the Historic Preservation Commission. To power the lights, Lightrail's sponsors hope to affix utility boxes to a series of 83 ornate lampposts called the Path Of Gold Standards, which have historical landmark status. A committee of the Historic Preservation Commission will be considering the project this Wednesday (6/4/14).
Assuming all such issues get resolved, Lightrail could be installed later this year. The project is only meant to be temporary though; it would be dismantled some time in 2018."