Highway Safety Analysis Toolbox

State Policies and Procedures on the Use of the Highway Safety Manual (HSM)

Scale and Scope of Safety Assessment Methods in the Project Development Process

AASHTO's Highway Safety Manual

The HSM introduces a science-based technical approach that takes the guesswork out of safety analysis. The HSM provides tools to conduct quantitative safety analyses, allowing for safety to be quantitatively evaluated alongside other transportation performance measures such as traffic operations, environmental impacts, and construction costs. The HSM provides the following tools:

              • Methods for developing an effective roadway safety management program and evaluating their effects.
              • A predictive method to estimate crash frequency and severity.
              • Guidance on the development and application of crash modification factors to estimate crash reductions.
                 
  
  
  
  
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2005_LA_Crash_Report_Guide01.pdf2005_LA_Crash_Report_Guide013/9/2015 12:37 PM2016 KB
2017 SHSP Final.jpg2017 SHSP Final7/27/2017 1:42 PM61 KB
2017 SHSP.jpg2017 SHSP7/27/2017 1:37 PM70 KB
2017 SHSP.pdf2017 SHSP7/26/2017 1:31 PM6101 KB
CAT SCAN 2014 - Segments - SPFs Method - 20160322.xlsmCAT SCAN 2014 - Segments - SPFs Method - 201603223/14/2017 8:18 AM1181 KB
Content Manager User Manual.pdfContent Manager User Manual3/6/2015 7:56 AM1262 KB
Crash1 User Manual_Outside DOTD.pdfCrash1 User Manual_Outside DOTD3/9/2015 12:57 PM1233 KB
Crash3 User Manual_Outside DOTD.pdfCrash3 User Manual_Outside DOTD3/6/2015 7:56 AM606 KB
CrashMagic User Manual.pdfCrashMagic User Manual3/6/2015 7:56 AM2056 KB
CrashMagicTrainingNotes.pdfCrashMagicTrainingNotes3/6/2015 7:56 AM5471 KB
Guidelines for Crash Data Analysis using SPFs and Pattern Recognition Analysis - Jan 2016.pdfGuidelines for Crash Data Analysis using SPFs and Pattern Recognition Analysis - Jan 20162/10/2016 3:12 PM1102 KB
Guidelines for Crash Data Analysis using the Number-Rate Method and Overrepresentation - Jan 2016.pdfGuidelines for Crash Data Analysis using the Number-Rate Method and Overrepresentation - Jan 20162/10/2016 3:12 PM12878 KB
HSM Rural 2-Lane Roads - June 2015.xlsHSM Rural 2-Lane Roads - June 20157/13/2015 8:10 AM255 KB
HSM Rural Multilane Roads (Divided and Undivided) - March 2016.xlsHSM Rural Multilane Roads (Divided and Undivided) - March 20163/16/2016 6:25 AM203 KB
HSM Urban and Suburban Arterials - June 2015.xlsHSM Urban and Suburban Arterials - June 20157/13/2015 8:10 AM373 KB
LADOTD HSM Implementation.pdfLADOTD HSM Implementation12/18/2013 9:53 AM586 KB
Lat-Long User Manual_Outside DOTD.pdfLat-Long User Manual_Outside DOTD3/6/2015 7:56 AM885 KB
Louisiana Fact Sheet CMF Resource Guide.pdfLouisiana Fact Sheet CMF Resource Guide12/18/2013 9:54 AM1240 KB
Louisiana Fact Sheet Project Map.pdfLouisiana Fact Sheet Project Map12/19/2013 7:58 AM723 KB
Louisiana SHSP Jul17 FINAL.pdfLouisiana SHSP Jul17 FINAL7/27/2017 1:43 PM6362 KB
Louisiana SHSP_Jul17_v6_Dortha and Karla (2)_Page_01.jpgLouisiana SHSP_Jul17_v6_Dortha and Karla (2)_Page_017/26/2017 1:21 PM169 KB
Louisiana Strategic Highway Safety Plan (Updated Condensed March 2010).pdfLouisiana Strategic Highway Safety Plan (Updated Condensed March 2010)6/25/2014 7:31 AM2156 KB
Safety Triage 2013 - Both - 20170221.xlsxSafety Triage 2013 - Both - 201702213/14/2017 8:19 AM398 KB
Safety Triage 2014 - Intersection - 20160627.xlsmSafety Triage 2014 - Intersection - 201606273/14/2017 8:19 AM836 KB
Safety Triage 2014 - Segments - 20160627.xlsmSafety Triage 2014 - Segments - 201606273/14/2017 8:19 AM1209 KB
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 NCHRP 600: Human Factors Guidelines for Road Systems



The HFG serves as a complement to existing and planned design guides and standards, such as the MUTCD, AASHTO's Green Book, and the HSM, to promote improved safety for highway users. After using traditional resources to develop possible design alternatives to improve safety on an in service or planned intersection or section of roadway, the practitioner may then use the HFG to enhance the possible solutions. The easy-to-use guidelines in the HFG provide the highway designer and traffic engineer with objective, defensible human factors principles and information that can be used to support and justify design decisions. The HFG will allow the non-expert in human factors to recognize the needs and limitations of the road user in a more effective manner in the design and operation of roads that are safer for all. When reviewing either existing or planned roads or intersections, highway designers and traffic engineers are strongly encouraged to use the HFG to identify and develop the safest solutions for road users.



NCHRP Report 500 Series


Louisiana-specific Cost of Crashes* (Provided by Highway Safety Research Group, 2016) 

Crash Severity Type    

Crash Report Injury Code  Unit Cost Per Crash 
Fatal A     $1,710,561 
Severe Injuries B $489,446
Moderate Injuries C $173,578
Complaint Injuries D $58,636
Property Damage Only (PDO)   E $24,982

 Total estimated cost for Louisiana crashes =          $8.6 billion/yr

 *NOTE:  This table is for informational purposes and is intended to be used in conjunction with benefit cost analyses for potential safety projects.