Olinda Ranch/Blackstone Neighborhood Traffic Management Plan
SUMMARY OF EXISTING TRAFFIC & COLLISION DATA
In developing a neighborhood traffic management plan (NTMP), existing traffic counts, spot
speed surveys and traffic collisions in the study area are collected. They provide information
needed to evaluate existing conditions and also serve as a baseline for evaluating any
improvements that are installed as part of the NTMP.
For the Olinda Ranch/Blackstone NTMP, traffic volumes were collected for the five key
intersections in the area, daily traffic volumes, including haul trucks, were collected for Valencia
Avenue between Lambert Road/Carbon Canyon Road and Santa Fe Road. Speed surveys
were collected on Santa Fe Road both east and west of Valencia Avenue, and traffic collision
data for the key streets and intersections in the study area was collected. Each type of data is
illustrated on the attached exhibits and described below.
Exhibit A – Existing Traffic Data
Exhibit A illustrates the existing (2014) peak hour and daily traffic volumes and the results of
speed surveys in the study area, as follows:
AM/PM peak hour intersection volumes are the number of vehicles moving through an
intersection during the hour with the most traffic during the morning “rush hour” and during the
evening “rush hour”. The arrows indicate the direction of travel with the number on the left
being the AM peak hour volumes and the number on the right being the PM peak hour volumes.
The volumes are in vehicles per hour. These intersection volumes are good indicators of traffic
patterns and can also be used to assess how well the intersection is operating during the peak
hours. Peak hour traffic volumes were collected at the five key intersections in the study area.
The peak hour volumes indicate that traffic from the neighborhoods typically goes to and from
the west and south, with very little going to and from Carbon Canyon Road east of the study
area. The traffic volumes also confirm the heavy regional use of Carbon Canyon Road, with
westbound traffic heavy in the morning and eastbound traffic heavy in the evening.
At the intersection of Santa Fe Road/Carbon Canyon Road, the data confirms reports by
residents that motorists are violating the no southbound left turn restriction and that others are
avoiding it by going through to the park, where they make a U-turn and then turn right onto
eastbound Carbon Canyon Road. Although not shown, these numbers are higher during the
rest of the afternoon peak traffic period.
Daily traffic volumes show the total number of vehicles that travel on a given street segment
during a 24-hour period, in vehicles per day. Daily traffic volumes were collected on Santa Fe
Road in both the Olinda Ranch neighborhood (east of Valencia Avenue) and the Blackstone
neighborhood (west of Valencia Avenue). They were also collected on Valencia Avenue
between Lambert Road/Carbon Canyon Road and Santa Fe Road. Since Valencia Avenue is
the truck route to the County landfill, the number of trucks per day were also collected. The
Valencia daily volumes are shown by direction (northbound and southbound), with the number
on the left being the total number of vehicles and the number on the right being the truck traffic
only.
The daily volumes appear to indicate that Santa Fe Road carries far more traffic in the
Blackstone neighborhood than it does in the Olinda Ranch neighborhood.
A further
assessment, however, of the peak hour volumes at the intersection of Santa Fe Road and
Valencia Avenue was made to estimate daily traffic on Santa Fe Road just east of Valencia
Avenue, and it indicates that there is more daily traffic east of than west of Valencia Avenue.
Most of the Olinda Ranch traffic enters/exits the neighborhood on Santa Fe Road at Valencia
Avenue, with more than half using Valencia Avenue rather than Santa Fe Road.
The 85th percentile speed is the vehicle speed that 85% of the vehicles are traveling at or
below. This is the speed that is used to set the speed limits, as required by federal and state
law. The 85th percentile speed rounded to the nearest 5 mph is the required speed limit. If
certain conditions are met, the speed limit may be reduced by 5 mph. Speed surveys were
conducted in both neighborhoods. If the collected speeds were used as the basis of the speed
limits, the speed limit on Santa Fe Road would be set at 45 mph, with the possibility of reducing
it to 40 mph, and no lower.
Table 1 and Exhibits B & C – Traffic Collision Data
As with traffic counts, traffic collision data is gathered at intersections and by street segment
(mid-block). Table 1 lists both mid-block and intersection collisions in the study area. Exhibits
B-1 and B-2 show the mid-block traffic collisions on the study roadways in Blackstone and
Olinda Ranch neighborhoods, respectively. Exhibits C-1 through C-5 show the traffic collisions
at the five key study intersections. For reference purposes, the numbers on the exhibits match
the numbers in Table 1. Reported collisions are shown for the most recently available 5-year
period, which was from January 2009 to February 2014. It should be kept in mind that Santa Fe
Road west of Valencia Avenue was only recently developed and the collision history does not
extend back the full five years. The primary purpose of collecting and reviewing traffic collision
data is to determine if there is a clear collision pattern that should be addressed.
For the mid-block collisions, each colored dot represents a collision, with the color indicating the
year of the collision and the letters showing the type of collision. There are few reported
collisions along Santa Fe Road, and most involve vehicles hitting fixed objects (curb, light pole,
parked vehicle, etc.). The majority of collisions along Lambert Road/Carbon Canyon Road are
rear end, fixed objects and sideswipes. Rear end and sideswipe collisions are typical of stop
and go traffic conditions. There are a variety of reasons for hit object collisions, including driving
under the influence, speeding and improper turning. There are no indications of collision
patterns that should be addressed.
The intersection collisions are shown on a separate exhibit for each key study intersection,
called collision diagrams. Intersection collision diagrams provide more detailed information,
illustrating the type of collision, the direction(s) traveled before the collision, and the part of the
intersection in which it occurred.
The intersections of Santa Fe Road-Kraemer Boulevard/Lambert Road and of Valencia
Avenue/Lambert Road-Carbon Canyon Road have the most collisions, which is to be expected
since they have the most traffic. As with the mid-block collisions on Lambert Road/Carbon
Canyon Road, both intersections have several rear end collisions. The other primary type of
collision at Santa Fe Road-Kraemer Boulevard/Lambert Road is side swipes for vehicles making
dual right turns from eastbound Lambert Road to southbound Kraemer Boulevard. This pattern
will be reviewed further to determine if there is a way to reduce these collisions. At Valencia
Avenue/Lambert Road-Carbon Canyon Road, there are a variety of types of collisions, with no
clear pattern of a condition that should be addressed.
There are few reported collisions at the other three key study intersections and there are no
indications of patterns that should be addressed.
6/7
81/25
1/2
99/770
148/129
241/305
R
in
g
ro
ss
Ave.
C
ay
Valley
45
ilw
Ra
4
1/4
1/1
3/12
18/20
166/1345
6/8
4/4
1121/233
1/0
5
Can
yon
Rd.
23/12
0/2
43/76
88/604
486/295
4/8
583/177
594/117
Carbon
28/18
0/1
1/3
54/53
280/85
4/19
L
3
876
Brea Hills Ave.
d.
rt R
amb e
d.
Ave.
3625\364
3221\364
Dr.
nj al Dr. Rub el
Na ra
er Ridge Dr.
Ton n
.
n
ia L
Tap
Kraemer Blvd.
1
43
Fe
2
.
Rd
44
4,290
Valencia
220/97
115/94
5/4
17/182
85/157
279/493
ta
San
5,012
92/167
122/14
41/69
6/11
40/110
82/50
6/7
694/479
173/52
102/149
609/850
749/378
2/2
152/79
180/79
1/10
1106/210
8/19
162/1261
LEGEND
1
= STUDY INTERSECTION
88/604 = AM/PM PEAK HOUR VOLUME
5,012
45
3625\364
= DAILY TRAFFIC VOLUMES, VEHICLES PER DAY
= 85TH PERCENTILE SPEED, MPH
= DAILY ONE-WAY TRAFFIC VOLUME/DAILY ONE WAY TRUCK VOLUME, VEHICLES PER DAY
Existing Traffic Data
EXHIBIT A
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea
TABLE 1
Olinda Ranch / Blackstone Neighborhood Traffic Management Plan (NTMP)
TRAFFIC COLLISIONS (JAN 2009 - JAN 2014)
NO.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
LOCATION
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Kraemer Blvd & Lambert Rd
Kraemer Blvd & Lambert Rd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Lambert Rd & Kraemer Blvd
Santa Fe & Tonner Ridge
Santa Fe & Rubel
Santa Fe Rd & Valencia Ave
Valencia Ave & Santa Fe Rd
Lark Ln & Santa Fe Rd
Santa Fe Rd & Valley
Santa Fe Rd & Railway Ave
Carbon Canyon Rd & Santa Fe Rd
Santa Fe & Carbon Canyon Rd
Santa Fe & Carbon Canyon Rd
Carbon Canyon Rd & Santa Fe Rd
Santa Fe Rd & Lambert Rd
Valencia Ave & Carbon Canyon Rd
Lambert Rd & Kraemer Blvd
Lambert Rd & Walden Rd
Lark Ln & Santa Fe Rd
Lambert Rd & Sunflower St
Lambert Rd & Sunflower St
Lambert Rd & Sunflower St
Lambert Rd & Sunflower St
Lambert Rd & Valencia Ave
Lambert Rd & Valencia Ave
Lambert Rd & Valencia Ave
Lambert Rd & Valencia Ave
Carbon Canyon Rd & Valencia
Carbon Canyon Rd & Valencia
Lambert Rd & Walden Rd
Lambert Rd & Valencia Ave
Lambert Rd & Valencia Ave
Carbon Canyon Rd & Valencia
DIST/DIR
0' In Int
20' W
0' In Int
40' E
5' W
5' W
0' In Int
31' S
20' S
0' In Int
68' W
50' W
17' W
0' In Int
30' E
60' E
182' W
45' E
100' E
0' In Int
26' N
305' E
470' E
6' W
11' N
20' N
0' In Int
10' N
528' N
350' E
5' E
26' N
363' W
15' E
150' E
160' E
1200' W
800' W
450' W
345' W
50' W
70' E
5' E
106' W
15' E
10' E
TYPE
Broadside
Rear-End
Head-On
Rear-End
Sideswipe
Sideswipe
Broadside
Sideswipe
Sideswipe
Sideswipe
Sideswipe
Rear-End
Broadside
Broadside
Rear-End
Rear-End
Other
Hit Object
Hit Object
Broadside
Hit Object
Rear-End
Hit Object
Hit Object
Hit Object
Broadside
Broadside
Rear-End
Rear-End
Sideswipe
Broadside
Hit Object
Rear-End
Hit Object
Hit Object
Other
Hit Object
Rear-End
Overturn
Rear-End
Rear-End
Rear-End
Broadside
Sideswipe
Rear-End
Rear-End
1
PCF2
Stop Sign/ Signal
Unsafe Speed
Stop Sign/ Signal
Unsafe Speed
Improper Turning
Improper Turning
ROW Auto
Improper Turning
Lane Change
Improper Turning
Lane Change
Unsafe Speed
ROW Auto
Traffic Signals/ Signs
Unsafe Speed
Unsafe Speed
Unsafe Speed
Improper Turning
Improper Turning
ROW Auto
Improper Turning
Unsafe Speed
Unsafe Speed
Unsafe Speed
DUI
Unknown
Improper Turning
Other Improper Driving
Unsafe Speed
Unsafe Lane Change
Improper Turning
Improper Turning
Unsafe Speed
DUI
Unsafe Speed
Improper Turning
Unsafe Speed
Unsafe Speed
Improper Turning
Unsafe Speed
Unsafe Speed
Unsafe Speed
Improper Turning
Unsafe Speed
Unsafe Speed
Unsafe Speed
DATE
2/11/2009
9/29/2009
11/18/2009
10/18/2010
12/15/2010
8/3/2011
8/26/2011
8/12/2012
9/20/2012
1/26/2012
2/26/2012
9/14/2012
8/3/2013
8/16/2011
2/28/2013
1/10/2014
7/22/2102
9/28/2013
1/25/2009
11/28/2012
2/5/2012
1/31/2011
8/8/2011
1/19/2010
8/9/2012
9/12/2012
12/4/2011
11/5/2012
8/30/2012
6/2/2013
7/2/2013
2/5/2012
10/30/2010
7/21/2013
3/14/2013
4/13/2010
12/3/2012
8/31/2010
5/28/2009
8/17/2011
1/29/2009
5/6/2009
7/2/2013
5/29/2009
11/30/2009
4/24/2010
TIME
6:10
17:40
10:59
15:01
9:12
10:18
20:22
15:42
10:31
15:27
8:59
13:04
12:09
14:30
12:00
11:08
15:53
17:20
10:18
18:21
6:18
7:45
22:46
12:52
18:57
10:29
13:26
9:01
23:44
18:21
14:29
6:18
9:54
3:45
13:20
17:51
23:17
17:17
5:39
16:45
16:53
8:23
14:29
8:39
8:12
15:27
TABLE 1
Olinda Ranch / Blackstone Neighborhood Traffic Management Plan (NTMP)
TRAFFIC COLLISIONS (JAN 2009 - JAN 2014)
NO.1
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
1
2
LOCATION
Carbon Canyon Rd & Valencia
Lambert Rd & Valencia Ave
Valencia Ave & Carbon Canyon Rd
Valencia Ave & Lambert Rd
Carbon Canyon Rd & Valencia Ave
Carbon Canyon Rd & Valencia Ave
Carbon Canyon Rd & Valencia Ave
Lambert Rd & Valencia Ave
Lambert Rd & Valencia Ave
Valencia Ave & Carbon Canyon Rd
Valencia Ave & Carbon Canyon Rd
Valencia Ave & Lambert Rd
Carbon Canyon Rd & Valencia
Carbon Canyon Rd & Valencia Ave
Carbon Canyon Rd & Valencia Ave
Carbon Canyon Rd & Valencia Ave
Carbon Canyon Rd & Valencia Ave
Carbon Canyon Rd & Santa Fe Rd
Carbon Canyon Rd & Santa Fe Rd
Carbon Canyon Rd & Santa Fe Rd
Carbon Canyon Rd & Santa Fe Rd
Carbon Canyon Rd & Santa Fe Rd
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Santa Fe Rd
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Brea Hills Ave
Carbon Canyon Rd & Santa Fe Rd
Santa Fe Rd & Tapia Ln
DIST/DIR
0' In Int
0' In Int
20' S
50' N
30' E
0' In Int
0' In Int
0' In Int
40' W
0' In Int
3'
0' In Int
300' E
376' E
867' E
900' E
1200' E
1495' W
840' W
253' W
243' E
650' E
347' W
300' W
50' E
0' In Int
404' E
581' E
818' E
1800' E
1056' E
1287' E
650' E
2500' E
100' E
TYPE
Broadside
Broadside
Sideswipe
Hit Object
Rear-End
Broadside
Broadside
Broadside
Rear-End
Rear-End
Rear-End
Broadside
Rear-End
Rear-End
Sideswipe
Rear-End
Hit Object
Rear-End
Hit Object
Hit Object
Rear-End
Sideswipe
Sideswipe
Hit Object
Sideswipe
Sideswipe
Rear-End
Hit Object
Rear-End
Rear-End
Sideswipe
Rear-End
Rear-End
Hit Object
Other
Number corresponds to number on Exhibits B-1, B-2, C-1 - C-5
PCF = Primary Collision Factor = Main cause of the collision
2
PCF2
Stop Sign/ Signal
Stop Sign/ Signal
Improper Passing
Other Than Driver
Unsafe Speed
Stop Sign/ Signal
Stop Sign/ Signal
Unknown
Starting/Backing
Unsafe Speed
Unsafe Speed
Traffic Signals/ Signs
Unsafe Speed
Unsafe Speed
Unknown
Unsafe Speed
Unsafe Speed
Unsafe Speed
Unsafe Speed
DUI
Unsafe Speed
Improper Turning
Unsafe Lane Change
DUI
Improper Turning
Unknown
Unsafe Speed
DUI
Unsafe Speed
Unsafe Speed
Improper Turning
Unsafe Speed
Unsafe Speed
Starting/ Backing
Other Than Driver
DATE
9/16/2010
11/14/2010
11/4/2010
4/17/2010
4/8/2011
6/7/2010
10/27/2011
10/10/2011
8/30/2012
8/4/2012
9/18/2012
1/8/2014
4/3/2009
3/30/2011
9/2/2011
7/11/2013
5/6/2013
12/16/2011
2/28/2010
9/8/2013
9/27/2013
11/10/2009
1/5/2013
8/16/2009
6/2/2009
10/17/2013
10/2/2009
1/10/2009
10/11/2010
7/28/2010
5/22/2010
9/17/2013
10/18/213
10/1/2010
8/26/2013
TIME
19:22
11:56
16:36
12:34
17:41
20:34
15:57
9:42
18:43
19:06
7:40
13:52
16:39
7:05
16:37
17:16
9:06
17:31
2:27
0:26
18:01
18:39
17:44
5:07
17:18
17:58
17:04
0:29
16:30
17:26
16:45
16:55
15:32
9:17
15:40
18.FO
17.O(B)
81.O
29.RE
37.FO
38.RE
39.O
40.RE
44.SS
36.SS
33.RE
30.SS 31.BR
34.FO 35.FO
LEGEND
HO = HEAD-ON
SS = SIDESWIPED
BR = BROADSIDE
FO = HIT OBJECT
RE = REAR END
OT = OVERTURNED
O = OTHER
(B) = BICYCLE
= YEAR 2009
= YEAR 2010
= YEAR 2011
= YEAR 2012
= YEAR 2013
Note: See Exhibit C for collisions at major intersections
MID-BLOCK TRAFFIC COLLISION LOCATIONS
EXHIBIT B-1
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea
21.FO
22.RE
29.RE
23.FO
59.RE
62.RE
60.RE
63.FO
61.SS
64.RE
65.FO
66.FO
67.RE
68.SS
70.FO
79.RE 69.SS
73.RE
74.FO
76.RE
LEGEND
SS = SIDESWIPED
BR = BROADSIDE
FO = HIT OBJECT
RE = REAR END
75.RE
77.SS
78.RE
80.FO
= YEAR 2009
= YEAR 2010
= YEAR 2011
= YEAR 2012
= YEAR 2013
Note: See Exhibit C for collisions at major intersections
MID-BLOCK TRAFFIC COLLISION LOCATIONS
EXHIBIT B-2
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea
INTERSECTION TRAFFIC COLLISIONS
EXHIBIT C-1
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea
INTERSECTION TRAFFIC COLLISIONS
EXHIBIT C-2
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea
INTERSECTION TRAFFIC COLLISIONS
EXHIBIT C-3
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea
INTERSECTION TRAFFIC COLLISIONS
EXHIBIT C-4
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea
INTERSECTION TRAFFIC COLLISIONS
EXHIBIT C-5
Olinda Ranch/ Blackstone NTMP
Summary Report (#102313)
City of Brea