s21 Using Ishdm Ltc2013
of 17
Transcript of s21 Using Ishdm Ltc2013
-
7/29/2019 s21 Using Ishdm Ltc2013
1/17
HSM APPLICATIONUSING IHSDM(I-12 TO BUSH)
April Renard, P.E.
LADOTD Highway Safety
-
7/29/2019 s21 Using Ishdm Ltc2013
2/17
PROJECT
OVERVIEW
Alternative N-S
corridor to I-12
Louisiana
Revised Statute
47:820.2B(e)
4-lane arterial
Limited access
facility
-
7/29/2019 s21 Using Ishdm Ltc2013
3/17
I-12 TO BUSH PROPOSED ALTERNATIVES
No Build
Alternative B/O
Alternative J
Alternative PAlternative Q
-
7/29/2019 s21 Using Ishdm Ltc2013
4/17
ALTERNATIVE SELECTION CRITERIA
Land Use
Water Resources
Ecological Resources
Land cover
Wildlife
Sensitive habitats
T&E species
Wetlands
Geology and Soils
Air Quality
Noise
Recreational Resources
Traffic andTransportation
Access
Operations Safety
Utilities
Socioeconomics
Aesthetic and VisualResources
Cultural Resources
Hazardous and ToxicSubstances
-
7/29/2019 s21 Using Ishdm Ltc2013
5/17
ALTERNATIVE SELECTION CRITERIA
Land Use
Water Resources
Ecological Resources
Land cover
Wildlife
Sensitive habitats
T&E species
Wetlands
Geology and Soils
Air Quality
Noise
Recreational Resources
Traffic andTransportation
Access
Operations Safety
Utilities
Socioeconomics
Aesthetic and VisualResources
Cultural Resources
Hazardous and ToxicSubstances
-
7/29/2019 s21 Using Ishdm Ltc2013
6/17
SAFETY
Goal: Quantify the perceived safety benefits from
constructing the project.
Presumption: Traffic diverted from existing
roadways with lesser design standards to
proposed alignment with higher design standards
will result in a reduction in crashes.
Methodology: HSM Predictive Method (most
reliable)
-
7/29/2019 s21 Using Ishdm Ltc2013
7/17
AREAOF ANALYSIS
Existing routes
Proposed
alignments
-
7/29/2019 s21 Using Ishdm Ltc2013
8/17
IHSDM SOFTWARE
Interactive Highway Safety
Design Model
Developed in coordination with
TRB, AASHTO and FHWA
Decision-support tool;
evaluates safety and
operational effects of geometric
design decisions on highways
Incorporated HSM Predictive
Method in 2010
-
7/29/2019 s21 Using Ishdm Ltc2013
9/17
DATAREQUIREMENTS
Horizontal curvature
Vertical curvature
Cross sectional elements
Number of lanes andlane width
Shoulder width and
type
Cross slope Roadside foreslope
Median width and
type
ADT
Design Speed
Driveway Density
Roadside HazardRatings
Intersections
Traffic control
Skew angle Turn lanes
-
7/29/2019 s21 Using Ishdm Ltc2013
10/17
DATA RESOURCES
Highway Needs Database
Surface Type Log File
Data Collection/Management Systems
Network Plans Room LandXML files*
Google Earth
Planning models (Transcad, REMI)
-
7/29/2019 s21 Using Ishdm Ltc2013
11/17
HIGHWAY NEEDS
-
7/29/2019 s21 Using Ishdm Ltc2013
12/17
STUDIED SECTIONS
US 190
US 190 Business
LA 21
LA 59 LA 36
LA 435
LA 41
LA 434
US 11
4 Alternatives
-
7/29/2019 s21 Using Ishdm Ltc2013
13/17
PREDICTED NUMBEROF CRASHES
Route Control Section No Build Alt B/O Alt J Alt P Alt Q
1a US 190 013-11 478.44 463.41 468.03 464.58 472.14
US 190-X 013-10 27.54 26.17 26.33 26.25 26.84
LA 21 030-01 88.49 97.14 67.84 46.16 70.52
594.47 586.72 562.2 536.99 569.5
1b LA 59 281-03 84.7 70.77 80.64 76.07 80.66
LA 36 280-01 16.37 15.76 15.44 15.2 15.28
LA 59 852-09 17 11.84 14.32 12.76 11.68LA 21 030-01 75.72 58.52 37.26 22.7 38.77
193.79 156.89 147.66 126.73 146.39
1c LA 59 281-03 84.7 70.77 80.64 76.07 80.66
LA 435 281-04 29.31 26.29 28.86 41.24 30.57
LA 41 058-02 28.98 24.62 3.22 2.98 3.18
142.99 121.68 112.72 120.29 114.41
2 US 11 018-04 28.69 27.89 25.72 27.42 27.63
LA 41 058-01 91.38 81.12 36.64 61.64 50.74LA 41 058-02 28.98 24.62 3.22 2.98 3.18
149.05 133.63 65.58 92.04 81.55
3 LA 434 852-12 7.09 4.45 5.6 5.24 5.43
LA 36 280-03 10.11 9.9 12.02 10.93 24.43
LA 41 058-01 53.67 45.87 11.75 30.44 14.58
LA 41 058-02 28.98 24.62 3.22 2.98 3.18
99.85 84.84 32.59 49.59 47.62
4 Proposed Alternative 0 43.58 43.5 30.37 32.5
TOTAL NETWORK CRASHES 1180.15 1127.34 964.25 956.01 991.97
-
7/29/2019 s21 Using Ishdm Ltc2013
14/17
DISTRIBUTIONOF CRASHES
Severity LA (all) LA (rural 2-lane) HSM (rural 2-lane)
Fatal 0.44% 2.08% 1.30%
Severe 0.83% 1.08% 5.40%
Moderate 6.15% 10.59% 10.90%
Possible Injury 21.70% 30.92% 14.50%
PDO 70.89% 55.33% 67.90%
100.00% 100% 100.00%
-
7/29/2019 s21 Using Ishdm Ltc2013
15/17
COSTOFCRASHES
Severity Cost per Person
Cost per Person
(w/ Loss of
Quality of Life)
Fatal $1,241,054 $4,275,313
Severe $917,127 $1,990,456
Moderate $160,602 $299,823
Possible Injury $7,953 $10,782
PDO $3,216 $3,216
-
7/29/2019 s21 Using Ishdm Ltc2013
16/17
OVERALL COMPARISON
Rank Alternative
Total Network
Crashes
Reduction in
Crashes
Total Cost of
Crashes* Reduction in Cost
1 P 956.01 224.14 $25,693,587.03 $6,023,954.35
2 J 964.25 215.9 $25,915,044.08 $5,802,497.30
3 Q 991.97 188.18 $26,660,042.81 $5,057,498.57
4 B/O 1127.34 52.81 $30,298,227.43 $1,419,313.95
5 No Build 1180.15 0 $31,717,541.38 $0.00
*Louisiana crash distribution and cost estimates (do not include pain and suffering)
Rank Alternative
Total Network
Crashes
Reduction in
Crashes
Total Cost of
Crashes* Reduction in Cost
1 P 956.01 224.14 $55,592,679.06 $13,033,904.54
2 J 964.25 215.9 $56,071,841.07 $12,554,742.53
3 Q 991.97 188.18 $57,683,779.29 $10,942,804.31
4 B/O 1127.34 52.81 $65,555,643.57 $3,070,940.03
5 No Build 1180.15 0 $68,626,583.60 $0.00
*Louisiana crash distribution and cost estimates (includes pain and suffering)
-
7/29/2019 s21 Using Ishdm Ltc2013
17/17
Questions?
www.ihsdm.org
April Renard, P.E.LADOTD, Highway Safety
(225)379-1919
http://www.ihsdm.org/mailto:[email protected]:[email protected]://www.ihsdm.org/http://www.ihsdm.org/
