safety and highway safety manual implementation … •show how nevada is advancing safety on it’s...

Safety and Highway Safety Manual

Implementation in Nevada

MAY 21, 2016

ITE INTERMOUNTAIN SECTION

JACOB FARNSWORTH, P.E.

Outline

• Objectives

• Background Information

• NDOT’s Safety Projects• Road Safety Assessments

• Traffic Safety Engineering Design

• Safety Management Plans

• Conclusion

Objectives

• Show how Nevada is advancing safety on it’s roadways through it’s Strategic Highway Safety Plan (SHSP) and implementation of the Highway Safety Manual (HSM).

• Provide an overview of specific approaches currently being used on safety related projects

• To get you thinking “Safety”

Nevada SHSP Integrating safety

Highway Safety Manual (HSM)

• Purpose:• Improves decision making

based on safety performance

• Science-based

• Provides information and tools

Project Development Process

Operations, Maintenance & Construction

SAFETY

Project Safety Process

• A guide for incorporating HSM processes into the Project Development Process in Nevada

• Establish a consistent process of quantifying safety impacts to the extent practicable

Project Safety Process

• CMF

• Predictive Method

• Benefit Cost Ratio

Safety Projects

• Road Safety Assessments

• Safety Management Plans

• Traffic Safety Engineering Design

RSA

SMPTSED

Road Safety Assessments (RSA)

• Formal safety evaluation by an independent multidisciplinary team

• Provides safety improvement suggestions

• Includes:• Crash reduction analysis

• Preliminary cost analysis

• Typically leads into Project Scoping, Safety Management Plans, and/or Traffic Safety Design Projects

Safety Management Plan (SMP)

• Purpose:• Safety focused corridor study

• Includes all road users

• Collaboration with stakeholders and public

• Develop short and long range projects

• Intent• Provide NDOT and local agencies with a list of

projects that should be considered

• Planning for future funding

• Leads into Traffic Safety Engineering Design

SMP – A RSA on STERIODS

• Includes:• Crash Analysis

• Existing Conditions Analysis and Maps

• Road User Analysis

• Capacity Analysis

• Review of Policies, Plans, and Studies

• Land Use and Economic Development Analysis

• Crash Predictions

• Benefit Cost Analysis

• Recommendations

SMP - Example

• 3.6 Mile Corridor

• 46 Intersections• 14 Signalized

• North Section• 4 Lanes

• 13,000-17,500 AADT

• South Section• 6 Lanes

• 20,000-40,000 AADT

15

Vicinity Map

NDOT Safety Management Plan - Eastern AveData Source:

NDOT 12/01/**-12/01/**

Legend

Signalized Intersection

Non-Signalized Intersection

Median

4 Lanes, No Median

4 Lanes, Raised Median

6 Lanes, Raised Median

Major Roads

City Boundaries

95

LAS V

EGAS BLV

D

LAKE MEAD BLVD

OWENS AVE

WASHINGTON AVE

BONANZA RD

BR

UC

E S

T

PEC

OS

RD

EVANS AVE

CHEYENNE AVE

CAREY AVE

STEWART AVE0 0.5 10.25

Miles

HARRIS AVE

CEDAR AVE

SEA RLES AVE

TONOPAH AVE

CARTIER AVE

BROOKS AVE

NORTH

LAS VEGAS

LAS VEGAS

CIV

IC C

ENT

ER

DR

EAST

ER

N A

VE

CONSTITUTION WAY

Crash Analysis

• Crash Rate• Corridor - 7.72 crashes per MVMT

Crash Severity Overall Pedestrian Bicycle Bus

Fatal 2 0.2% 0 0.0% 0 0.0% 0 0.0%

Injury A 34 2.8% 6 33.3% 0 0.0% 1 5.9%

Injury B 92 7.5% 6 33.3% 4 36.4% 2 11.8%

Injury C 410 33.4% 5 27.8% 6 54.5% 2 11.8%

PDO 687 56.1% 1 5.6% 1 9.1% 12 70.6%

Total (5 Years) 1,225 (100%) 18 (1.5%) 11 (0.9%) 17 (1.4%)

Crash Analysis

Existing Conditions

Policies, Plans, and Studies

• 22 Document Reviewed• Las Vegas

• North Las Vegas

• Regional Transportation Commission

• NDOT

Crash Issues and Risk Factor• Crash rates

• Access Management• Driveways

• Median Openings

• Pedestrian, Bicycle, and Transit Facilities

• No Shoulder

• Speeding

• Lighting

• ADA

• Sidewalk Obstruction

• Capacity

Proposed Improvements

What can be done within the Right-of-Way?

• Short-Term Low-Cost

• Mid-Term• Alternative #1

• Alternative #2

• Alternative #3

• Long-Term

Short-Term Improvements

• Midblock Crossing w/ Ped Flashing Beacon

• Crosswalk Improvements w/ Ped Flashing Beacon

• Pedestrian Barrier

• Street Lighting Improvements

• Intersection Curb Modifications

• S-Island Medians

Mid-Term Alternative #1

• Lane Narrowing

• Corridor Improvements• Access Management (Medians)

• Traffic Control Devices

• Lighting Upgrades

• Roadway Improvements

• Landscape

• Bike Lane

Mid-Term Alternative #1

• Lane Narrowing

• Corridor Improvements• Access Management (Medians)

• Traffic Control Devices

• Lighting Upgrades

• Roadway Improvements

• Landscape

• Bike Lane

Mid-Term Alternative #2

• Lane Narrowing

• Corridor Improvements• Access Management (Medians and Driveways)

• Additional Lighting

• Wider Sidewalks

• Buffered Bike Lane

• Lane Removal

• Bus Turnouts

Mid-Term Alternative #2

Mid-Term Alternative #3

• Lane Narrowing

• Corridor Improvements

• Buffered Bike Lane

• Lane Removal

• Bus Turnouts

• Roundabouts• 3 Intersections

Long-Term Improvements

• Reconstruction of Interchange

• One-way Circulator Road

• Relocation of Corridor Utilities

• Construction of New Interchange on US 95

HSM Crash Prediction

Analysis Tools• IHSDM – 4 lane divided

• HSM Spreadsheet (NCHRP 17-58) – 6 lane divided

Prediction Scenarios• Existing Conditions – 20 Years

• Alternative #1 – 20 Years

• Alternative #2 – 20 Years

• Alternative #3 – 20 Years

Crash Prediction Results

Existing Conditions

Alternative #1 Alternative #2 Alternative #3

Total Predicted Crashes (20 Years)*

3933 3093 2738 2724

Reduction in Total Crashes over Existing Conditions*

N/A 840 1195 1209

Crash Reduction Factor N/A 21.4% 30.4% 30.7%

Total Predicted Crashes/Year*

197 155 137 136

Benefit Cost Analysis

Alternative #1 Alternative #2

Total Annual Benefit $2,234,803 $3,178,209

Total Annualized Cost $754,531 $1,577,634

Benefit Cost Ratio 2.96 2.01

Average Annual Net Return $1,480,272 $1,600,575

• Short-Term Improvements

• Mid-Term • Alternative #1 - $10,226,924

• Alternative #2 - $21,383,276

Public Involvement

• Total Attendance – 22 People

• Potential Additional Short-Term Projects• Driveway Closure at Shopping Center

• Restriping and Improved Stripping at Specific Locations

• Additional Bus Turnouts

Recommendations1st Priority

• Short-Term Improvements

2nd Priority

• Mid-Term Improvements• Alternative #2 North of Washington Ave,

Alternative #1 South of Washington Ave

3rd Priority

• Long-Term Improvements

Traffic Safety Engineering Design

• Traffic Safety Design Projects

• Alternatives Development• Crash Modification Factors

• HSM Crash Prediction

• Benefit Cost Ratios

• 30%, 60%, 90%, and 100% Design Plans

Conclusion

• Nevada is advancing safety on it’s roadways through it’s Strategic Highway Safety Plan (SHSP) and implementation of the Highway Safety Manual (HSM).

• All stages of the Project Development Process

• Variety of safety related projects

• How can you incorporate safety?

Questions

Jacob Farnsworth, P.E.

(702) 862-3694

jacob.farnsworth@kimley-horn.com