City of San Marino Traffic Safety Measures
Speed Reduction Street Details
Segment #49: San Marino Avenue between North City Limit to Euston Road: This segment is a north/south minor arterial with 1 lane in each
direction, parking on both sides of the street and is currently posted at 30 MPH. The street serves residential land use with lots of residential
driveways. The street is approximately 40 feet in width with large shade trees and a curving road design that limits line of sight. Each major
intersecting street is STOP controlled. This segment has a higher than expected collision rate. The critical speed is 32.4 which justifies a 30 MPH
posted speed limit. However, with limited visibility and the collision rate a reduction in the posted limit to 25 mph is justified.
Segment #50: San Marino Avenue between Huntington Drive to South City Limit: This segment is a north/south minor arterial with 1 lane in
each direction, parking on both sides of the street and is currently posted at 30 MPH. The street serves some business near Huntington Drive and
mainly residential land use to the south with lots of residential driveways. This street is used as a cut thru route by regional traffic which makes it
difficult for resident to back out of their driveways. This segment has a higher than expected collision rate at 3.409 versus the expected rate of
1.84 for a similar street. The critical speed is 32.5 which justifies a 30 MPH posted speed limit. However, with limited visibility, unexpected vehicles
backing into the segment and a higher than expected collision rate a reduction in the posted limit to 25 mph is justified.
Segments #54 and #55: Sierra Madre Boulevard between North City Limit and Huntington Drive (NB and SB): This segment is considered a
Principal arterial in the California Road Systems (CRS) Maps that are approved by the Federal Highway Administration. The northbound and
southbound segments are divided by a raised median with each direction carrying 2 travel lanes with parking allowed along the street. Land use is
predominately residential with some business activity at the ends. The northbound direction in the southern end does not have sidewalks with
bushes and trees to the edge of the curb all along the route, as well as curves in the road which provide for hidden driveways with sight distance
challenges for residents backing onto the Sierra Madre travel way. Both segments have slightly higher than expected collision rates. The 85th%
speed of traffic for both directions came in at 37.4 which justifies a 35 MPH posted speed limit.
Cityy
SAN MARINO
CALIFORNIA
10
TRANSTECH
Est. 1989View entire presentation