I am seeking the most accurate available estimate of the combined
length of all of the public rights-of-way (streets, highways, alleys
etc.) that are maintained by the County of San Luis Obispo's
Department of Public Works (http://www.slocountypwd.org/) (i.e.,
excluding Federal and State highways like U.S. Route 101).

In addition to the specific number (in miles, feet or any unit), the
answer must identify a publicly available source from which the
information can be derived.

This information is likely to have been collected by the California
Departmant of Transportation (Caltrans) (http://www.dot.ca.gov/), as
part of its reporting to the federal Department of Transportation's
Bureau of Transportation Statistics (http://www.bts.gov/) for the
Transportation Statistics Annual Report
(http://www.bts.gov/publications/national_transportation_statistics/).

Other likely sources are the Institute of Transportation Studies at
Berkeley (http://www.its.berkeley.edu/index.html), and the National
Academy of Sciences' Transportation Research Board
(http://gulliver.trb.org/).

Hello Automandc,  

According to the publication titled ?Roads Program Status 2005? , the
maintenance division of the Public Works Department of the County of
San Luis Obispo is responsible for maintaining 1,316 miles of roads.

Excerpt:

?The maintenance division of the Public Works Department is
responsible for maintaining 1316 miles of roads, 200 bridges,
approximately 4,400 culverts and 270 cattle guards.

Our crews also maintain 14 traffic signals, approximately 11,200
traffic signs, and paint striping on approximately 850 miles of paved
roads. Additionally, the maintenance staff is responsible for managing
all encroachments in the road right of way.?

Source: 
County Of San Luis Obispo
Roads Program Status
January 25, 2005
Department Of Public Works
Noel King, Director
(Page 16)

Download the full text of this publication here:
http://www.slocountypwd.org/whatsnew/co_slo_RoadsProgramStatus_JAN-2005.pdf


Search criteria:
site:www.slocountypwd.org "*miles" roads maintenance

I hope the information provided is helpful!

Search terms used: 

Best regards,
Bobbie7

Great, thanks!  I had spent enough time on their website that I
thought I had seen everything.  Guess I was wrong.