HomeMy WebLinkAbout02_Circulation Element_2015 05 04 RRRChapter 2
Page 2‐28
Table 4. Street Classification Descriptions and Standards
Descriptions1 of Street Types
Maximum
ADT/LOS
Desired maximum
Speeds2
Local Commercial Streets directly serve non‐residential development that
front them and channel traffic to commercial collector streets. 5,000 25 mph
Local Residential Streets directly serve residential development that front
them and channel traffic to minor and major residential collector streets. 1,500 25 mph
Commercial Collector Streets collect traffic from commercial areas and
channel it to arterials. 10,000 25 mph
Residential Collector Streets (Minor) collect traffic from residential areas
and channel it to arterials. 3,000 25 mph
Residential Collector Streets (Major) collect traffic from neighborhood
commercial, high density residential and residential areas and channel it
to arterials.
5,000 25 mph
Residential Arterials are bordered by residential property where
preservation of neighborhood character is as important as providing for
traffic flow and where speeds should be controlled.
LOS D CVC*
Arterial Streets provide circulation between major activity centers and
residential areas
LOS E
(Downtown)
LOS D
(other routes)
CVC*
CVC*
Parkway Arterials /Regional Routes are arterial routes with landscaped
medians where the number of cross streets is limited and direct access
from fronting properties is discouraged. These routes connect the city
with other parts of the county and are used by people traveling
throughout the county and state and are designated as primary traffic
carriers.
LOS D CVC*
Highway/Freeway/Ramps is a regional route of significance where access
is controlled. Segments of these routes leading into San Luis Obispo
should include landscaped medians and roadside areas to better define
them as community entryways.
LOS D CVC*
*Speed Limits are dictated by prevailing speeds per the California Vehicle Code (CVC).
Notes:
(1) To determine the classification of a particular street segment, refer to Figure 1: Streets Classification Map and Appendix E. Appendix E
includes the most recent traffic counts and estimates of level of service (LOS). Traffic counts will be different for various segments of a
particular street. In some cases, a range of LOS ratings are shown on Appendix E for "Arterial" streets because of the variability of traffic
flow conditions along a particular corridor; and some street segments approaching intersections may have poorer LOS than shown in this
table. Note that all ADT should reflect volumes typically experienced when all schools are in session. To account for seasonal shifts ADT
shall be calculated using an annual average daily traffic (AADT) for individual volumes and the threshold shall be adjusted up to 15%.
(2) Desired maximum speed means that 85% of motorists using the street will drive at or slower than this speed. To account for seasonal
shifts speeds shall be calculated using an annual average or for individual speed surveys the threshold shall be adjusted up by 2.7 mph.