Experiences with Development and

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County Road Safety Plans


Experiences with Development and
Implementation

Richard (Rick) West, PE

Otter Tail County Public Works Director/County Engineer


2013 LTAP/TTAP National Conference

Boise, ID

July 22
-
25, 2013




Large rural county in West
Central MN


Land Area


2232 square miles


Population


58,000


1048 Lakes


Summer Population


150,000


62 Townships


22 Cities

Otter Tail County, MN


1052 miles of County Highways

(all paved)


2427 miles of Township Roads


142 Bridges


One third of County system has 11
foot lanes and 2 foot gravel
shoulders.


707 Horizontal Curves

Otter Tail County Highway System


Traffic Safety Showcase


Mendocino Co, CA


MN County Engineers Highway Safety Committee


Local road safety research/implementation projects by MN
Local Road Research Board


Development of the MN Crash Mapping Analysis Tool


Safe Communities Coalitions


Strong relationships with Mn LTAP, Mn/DOT, FHWA, NACE,
and ATSSA


Counties involved in Mn/DOT TZD efforts from beginning
(MN North Star Conference)


MN Counties Safety Background

2004


2011


S
ummary of the findings

of the

Otter Tail County Fatal Review Committee

January 1


December 31, 2010

Item

Specific Area
Reported

Number

Percentage

1

Total drivers

& passengers

killed

14

100%

2

Total
motor vehicle crashes resulting in fatalities

12

100%

3

M
ulti
-
vehicle
crashes

2

17
%


4

S
ingle vehicle crashes

10

83
%

5

D
rivers killed
(14 total drivers involved)

8

58
%

6

P
assengers killed

3


21
%

7

P
edestrians killed

3


21%

8

V
ictims
ejected and
not wearing seatbel
ts

when belts were
available (
3 of 4 not belted)

3

75
%

9

F
a
tal crashes involving motorcycles
/ATVs

3

21
%

10

M
otorcycle
/ATV

fatalities w/no helmet use
(3

of
3
)

3

100
%

1
1

C
rashes with impaired drivers

7

58
%

12

C
rashes occurring on curves

2

17
%

13

C
rashes where speed was
a likely c
ont
ributing factor

5

42
%

14

C
rashes weather/road conditions were factor

2

17%

15

C
rashes with driver medical conditions a
factor

2

17%

16

D
rivers charged in criminal court

3

21%

17

D
eceased victims who were local OTC residents

11

79%

18

C
rashes caused by

failure to yield right of way

2

17%

19

D
eaths caused by run off the road crashes

9

64%

20

Deaths resulting with speed as a contributing factor

6

43%

2
1

Cr
ashes
occurring
on township roads

4

33%

2
2

C
rashes
occurring
on County Highways

3

25%

2
3

C
rashes

occurring
on State Highways

3

25%

2
4

C
rashes
occurring
on interstate

highways

1

8%

2
5

C
rashes
occurring
on private
roadways

1

8%

2
6

Sex of deceased victims: 12 male (86%); 2 female (14%)

2
7

Sex of vehicle drivers: 12 male (86%); 2 female (14%)

2
8

A
ge of ATM/Motorcycle crash victims: 15


62 (actual ages: 15, 55, 62)

2
9

Age range of impaired drivers: 17
-
62 (actual ages: 17, 21, 33, 48, 55, 59, 62)














Impair
ments contributing to deaths of crash v
ictims:


Alcohol: 6 (43%)

Huf
fing: 1 (7%)

Prescription meds: 2 (14%)

THC: 2 (14%)


Age of All Drivers

(total drivers involved=14)

Number

Percentage

Age 15


24

4

28%

Age 25


55

5

36%

Age 56
-

79

5

36%

Age 80 +

0

0%

Time of Crashes

Number

Percentage

6 PM


Midnight

7

58%

Midnight


6AM


1


8%

6AM


6 PM

4

33%

MN LRRB Safety
-
Related Projects

Advanced Dynamic LED Warning Signs for Rural Intersections Powered by Renewable Energy (2007
and 2011)


Development of a digital highway framework to facilitate crash avoidance systems: Serving county
roads (2012)


Analysis of Highway Design and Geometric Effects on Crashes (2010)


MN Crash Mapping Tool (2008)


Rural Road Safety Solutions Workshops (2008)


Maintain a Safer Roadway Workshops (2010)


Estimating the Crash Reduction and Vehicle Dynamic Effects of Flashing LED Stop Signs (2009)


Best Practices and Policy Guidance County Roadway Safety(2011)


Best Practices for Sign Reduction on the Local System (2011)


Lighting Levels for Isolated Intersections Leading to Safety Improvements (2012)


Traffic Sign Life Expectancy (2012)



Minnesota Crash Mapping Analysis
Tool (MnCMAT)


In
order to assist cities and counties in gaining a
better
understanding
of crash characteristics on their systems,
Minnesota Local
Road Research Board and Minnesota
County
Engineers Association
(MCEA) have
made the
MnCMAT tool available



M
ap

based
computer application that provides
10 years
of
crash data for
every roadway
in
Minnesota



Individual
crashes are spatially located by reference point
along all roadways



Up
to
67
pieces of information are provided for each
crash,
including
route, location (reference point),
date/day/time,
severity
, vehicle actions, crash causation, weather,
road
characteristics
, and driver
condition



Analysts
can select specific intersections or roadway
segments
for study
. An overview of the entire
county, city,
MnDOT district or tribal government
can also be
generated
.

Minnesota Crash Mapping Analysis
Tool (MnCMAT)


The
recommended analytical
process for
conducting a safety/crash study is
to
compare
Actual

conditions at a
specific
location
(intersection or segment of
highway) compared
to
Expected

conditions (based
on documenting
the
average characteristics for
a large
system
of similar facilities
).



MnCMAT
supports this analytical
process
by
providing both the data for
individual
locations
and for larger systems


individual or
multiple counties
.



For more information about MnCMAT,
consult the
website:
http://www.dot.state.mn.us/stateaid/sa_c
rashmapping.html

Greater Minnesota Crash Data Overview

5 Year Crashes

165,739

5,770

State System

76,992


46%

2,362


41%

CSAH/CR

39,073


24%

2,242


39%

Rural

24,474


63%

1,860


83%

Urban

14,599


37%

382


17%

All Way Stop

438


6%

6


4%

Run Off Road

8,367


66%

790


67%

On Curve

3,550


42%

399


51%

Example

All


%

Severe


%

Right Angle


1,359 (48%),

41 (59%)

Head On


70 (3%),

7

(10%)


Left Turn


283 (10%),
4 (6%)

Rear End


368 (13%),

4 (6%)

Thru
-
Stop

2,810


38%

70


44%

Right Angle


651 (30%),
20 (56%)


Rear End


753 (34%),

5 (14%)

Left Turn


361 (17%),
4 (11%)

Head On


70 (3%),
2 (6%)

Signalized

2,189


29%

36


22%

Inters
-
Related

5,938


30%

535


30%

Source: MnCMAT Crash Data, 2004
-
2008

Severe is fatal and serious injury crashes (K+A).

City, Twnshp, Other

49,674


30%

1,166


20%

Inters
-
Related

7,448


51%

160


42%

Not Inters
-
Related

5,271


36%

199


52%

Run Off Road


1,283 (24%),
74

(37%)


Head On


361 (7%),

27 (14%)

Rear End


1,315 (25%),

21 (11%)

Right Angle


529 (10%),

18 (9%)

Animal

4,407


18%

74


4%

Not Inters
-
Related

12,627


63%

1,185


66%

Head On, SS Opp

821


7%

129


11%

On Curve

284


35%

47


36%

Unknown/Other

1,880


13%

23


6%

Unknown/Other

1,502


7%

66


4%

Other/Unknown

2,011


27%

48


30%

Right Angle


968 (35%),

145 (55%)


Run Off Road


360 (13%),

23 (9%)

Left Turn


183 (7%),

11 (4%)

Rear End


287 (11%),

8 (3%)

Thru
-
Stop

2,735


46%

263


49%

Run Off Road


1,047 (38%),

93 (38%)


Right Angle


297 (11%),

50 (20%)

Head On


119 (4%),

26 (11%)

Left Turn


186 (7%),

20 (8%)

Other/Unknown

2,755


47%

248


46%

Not Animal

20,067


82%

1,786


96%

All Way Stop

199


3%

19


4%

Signalized

249


4%

5


1%

-
ATP’s 1, 2, 3, 4, 6, 7, and 8


NO

Metro

Minnesota



State
(2
-
lane)

County
(All Rural Roads)

County
(Rural Paved)

County
(High Priority Rural Paved
-

4 and 5 Star)

Miles

8,760

34,700

21,760

2,820

No. of Severe Injuries

1320

2510

2247

569

Severe Injury Density

0.15

0.07

0.10

0.20

Severe Injury Crash Density

(Howard Preston, CH2M Hill)

Project Approach

Crash
Analysis

Select Safety
Emphasis
Areas

Identify
Short List
of Critical
Strategies

Identify
Safety
Projects

Safety
Workshop

Develop
Comprehensive
List of Safety
Strategies

Project Programming

Project Development

Implementation

Evaluation

Refinement & Update
SHSP

Safety Plan

Month 1

Month 5

Month 5

Month 4

Month 7

Month 9

Month 6

Review Mtg
w/ Counties

Kick
-
off Video
Conference


Plan Contents


Description of Safety Emphasis Areas.


Identification of high priority, low cost Safety
Strategies.


Documentation of at
-
risk locations on roadway
segments, horizontal curves, and intersections
based on crash data.


Development of $7,200,000. of suggested safety
projects.


Cost of plan development
-

$40,000.


Intersections (244)


Geometry


Inter. Skew


Geometry


Roadway (on or
near curve)


Commercial Development in
Quadrants


Distance to Previous STOP


ADT Ratio


R/R Crossing on Min. Appr.


Crash History


Curves (707)


Curve Radius


Traffic Volumes


Intersection in Curve


Visual Trap


Crash Experience

Risk Factors

Segments


ADT Range


Access Density


Road Departure Density


Critical Radius Curve Density


Edge Risk

Risk Factors

Summary of Results from Prioritized
Segments

Otter Tail County High Priority
Segment Map

Otter Tail County Segment Project
Summary

Sample
Segment
Project Form


Lane Marking and Curve Enhancements


12 counties


1670 miles of 6 inch
e
dge lines


46 miles of Rumble StripEs


325 Horizontal Curves


2267 chevrons


Contract
-

$1.6 million

2009
-
10 District 4 HSIP

D4
County Intersection
Lighting
Project


Scope


Six Counties


30 Intersections


Install Overhead Lighting
at Intersections


Cost


$360,000.

Otter Tail County Intersection Signing
Upgrade Project


Scope


County Wide


91 Intersections


TH Junction Signs


Stop Ahead Markings


Stop Bars


Cost


$158,000.


Otter Tail County CSAH Shoulder
Paving/Rumble Stripe Project


Scope


CSAH 9


5.3 Miles


4’ Paved Shoulder


1’ Rumble


6” Stripe


Cost


$293,000.

Future HSIP Projects

Priority
Focus Area
Locations
Cost
Federal
Local
Work Type
1
Lane Departure
13
$348,580.00
$313,722.00
$34,858.00
Enhanced Edge Line Markings - Phase I
2
Lane Departure
19
$349,835.00
$314,851.50
$34,983.50
Enhanced Edge Line Markings - Phase II
3
Intersection Improvements
44
$104,750.00
$94,275.00
$10,475.00
Enhaned Signage and Marking
4
Lane Departure
25
$82,500.00
$74,250.00
$8,250.00
Chevron Installation on Curves
5
Lane Departure
42
$283,052.00
$254,746.80
$28,305.20
Shoulder Paving and Rumble Strips on Curves - Phase IA
6
Lane Departure
59
$344,064.00
$309,657.60
$34,406.40
Shoulder Paving and Rumble Strips on Curves - Phase IB
7
Intersection Improvements
21
$203,000.00
$182,700.00
$20,300.00
Lighting
8
Lane Departure
78
$332,450.00
$299,205.00
$33,245.00
Shoulder Paving and Rumble Strips on Curves - Phase IIA
9
Lane Departure
48
$322,065.00
$289,858.50
$32,206.50
Shoulder Paving and Rumble Strips on Curves - Phase IIB
10
Lane Departure
42
$264,964.00
$238,467.60
$26,496.40
Shoulder Paving and Rumble Strips on Curves - Phase IIC
11
Lane Departure
50
$314,661.00
$283,194.90
$31,466.10
Shoulder Paving and Rumble Strips on Curves - Phase IID
441
$2,949,921.00
$2,654,928.90
$294,992.10
Otter Tail County Projects - Summary
HSIP 2014 - 2016

P
rovides information to educate the County Board
and the public.


Provides data sheets for HSIP funding applications.


Provides practitioners with a detailed, prioritized
county
-
wide, safety plan to guide and support future
safety investments.


The benefits far out weigh the challenges.

Summary


Otter Tail County Roadway Safety Plan: Mn/DOT
Office of State
-
Aid:
www.dot.state.mn.us/stateaid

or
rwest@co.ottertail.mn.us
.



MN Best Practices and Policies for Safety Strategies
on Highways and Local Roads: Same as above.



Or my friend Google.


Websites

Thank you

Richard West

Otter Tail County Public Works
Director/County Engineer

Phone: 218
-
998
-
8473


Email:
rwest@co.ottertail.mn.us


Address: 505 S. Court St., Suite 1



Fergus Falls, MN 56537