everydaycounts · high friction surface treatment benefits • increase friction by 87% • high...
TRANSCRIPT
http://www.fhwa.dot.gov/everydaycounts
March, 2017Khoa Nguyen, MS, P.E.Director, Office of Tech. Services
EVERY DAY COUNTS
Launched in October 2010
Designed to:
• Shorten project development & delivery
• Enhance the safety and performance of our highways and bridges
• Improve environmental sustainability
EVERY DAY COUNTSSAFETY INITIATIVES
Pedestrian & Bicycle Safety
Intersection Safety
Roadway Departure
Data Driven Safety Analysis
• Safety Edge• High Friction Surface Treatments
• Intersection Control Evaluation (ICE)• Roundabouts & Mini Roundabouts• Restricted Crossing U-Turn Intersection (RCUT)
• Safe Transportation for Every Pedestrian (STEP)
FLORIDA FATALITY DATA
* FARS ARF (preliminary)
FARS final data - 2006
through 2014
Florida
DISTRICT 7 FATALITY DATA
SAFE TRANSPORTATION FOR EVERY PEDESTRIAN (STEP)
Road Diets• Reduce speeds & No. of lanes • Create space for ped. facilities.
Pedestrian hybrid beacons• provide positive stop control
Pedestrian refuge islands• Shorten crossing distance• Elderly & limited mobility
pedestrians
Raised crosswalks• reduce vehicle speeds.
Visibility enhancements• Detect ped. particularly at
night.
Road Diet HAWK
Refuge Island Raised Crosswalk
Crosswalk Visibility
Florida:• Institutionalized
INTERSECTION CONTROL EVALUATION (ICE)
Benefits:• Consider all available Intersection Controls beyond Traditional Controls• Select an optimal control for a specific site and problem. Florida: Adopted and is in the process formalizing this concept.Resources:• Caltrans ICE Policy Directive• Minnesota DOT ICE Tech. Memo
RCUT
STOP
SIGNAL
DDI
ROUNDABOUT
ROUNDABOUTBenefits:• Reduce conflict points:32 to 8 for
vehicles & 16 to 8 for pedestrians• Benefit Cost Ratio as high as 15• Reduce Crashes by 70% - 90%Florida:• Intersection Design Guide • 3-step screening tool • Plans Preparation Manual (PPM)• Constructed 22 with 16 in design
GAINES ST. TALLAHASSEE
RESTRICTED CROSSING U-TURN INTERSECTION (RCUT)
Benefits• Reduce conflict points : 32 to 18• Reduce Serious Injuries crashes
by 42% to 70%• 30% increase in throughput and
40% reduction travel time
Florida:• Early Phase of the
implementation• FHWA-HRT-09-059
SAFETY EDGE
Benefits• Simple 30 degrees edge pavement• Easy and inexpensive to install• Eliminate Edge Drop-off• Effective Lane Departure Recovery• Pavement edge Density & Stability Florida• Only a few counties • “Greenbook”• Available shoe at the LTAP center
Shoe @ LTAP Center (UF)
Drift off – Over Correction - Collision
Drop-off Edge
HIGH FRICTION SURFACE TREATMENT
Benefits• Increase friction by 87%• High Benefit Cost Ratio of 40• Reduce Crashes by 30% to 80%Florida• A Study by Texas A&M Transportation Institute (TTI)• HFST Guidelines: Project Selection, Material &
Construction • Part of Safety Tool Box w/Specifications - Sec. 333 • Installed at 57 locations in Florida.
Thurston County, WA
AutomatedManual Aggregate
WHY? DATA DRIVEN SAFETY ANALYSIS (DDSA)
DDSA introduces two tools:Predictive analysis:• Crash, Frequency, Features & Volume• Existing Safety Performance• Safety performance of various alternatives• Proposed Safety Performance.Systemic analysis:• Severe crash locations are random• High-risk features remain consistent• Identify high-risk features across a network• Low-cost treatment across network.
Benefits:• Decision based on safety performance• Better Targeted Safety Investments• Effectively Reduce Fatalities and Serious
InjuriesFlorida:• Early Stage of integrating DDSA into the
HSIP Program
LIMITED RESOURCE
VS.
BIG ISSUE
=
WANT TO KNOW MORE?
Florida T2 Center (UF)
Improving FL’s Intersection Safety & Decreasing Roadway Departures WebinarMarch 28, 2017 9am till noonFDOT & FHWA perspectivesContact: David Page – Florida T2 Center
FHWA Roadway Departure & Intersection Safety WorkshopMay 9-10, 2017 in Gainesville @ the Florida T2 CenterTuesday noon - 4pm & Wednesday 8am - noonFHWA roadway departure & intersection subject matter expertsContact: Kevin Burgess – FHWA Florida Division