Evaluation of Connected Vehicle Technology to Reduce Crashes around - - PowerPoint PPT Presentation

▶
evaluation of connected vehicle technology to reduce
SMART_READER_LITE
LIVE PREVIEW

Evaluation of Connected Vehicle Technology to Reduce Crashes around - - PowerPoint PPT Presentation

Apr 10, 2023 263 likes •502 views

Evaluation of Connected Vehicle Technology to Reduce Crashes around School Bus Stops Kelly (Donoughe) Palframan, P.E., PhD Virginia Section ITS October 6, 2017 Format of Presentation Background on School Transportation Issues and

slide-1
SLIDE 1

Evaluation of Connected Vehicle Technology to Reduce Crashes around School Bus Stops

Kelly (Donoughe) Palframan, P.E., PhD Virginia Section ITS October 6, 2017

slide-2
SLIDE 2

Format of Presentation

Introduction

  • Background on School Transportation Issues

and Practices

  • Understanding the Problem

Connected Vehicle App.

  • Concept for a connected vehicle application to

improve safety at school bus stops

  • Results of an experiment to evaluate

effectiveness of the application

Advancing Transportation Through Innovation 2

slide-3
SLIDE 3

Introduction

slide-4
SLIDE 4

Background on School Transportation

  • 450,000 public school buses travel

approximately 4.3 billion annual miles to transport 23.5 million students

  • Accounts for 2% of school-aged motor

vehicle fatalities and injuries

  • Students are vulnerable road users

while waiting at bus stops.

Advancing Transportation Through Innovation 4

slide-5
SLIDE 5

Current State of the Practice

  • School Bus Stop Ahead Signs

– Placed along curvy or hilly terrain or when sight is restricted – No active indicator when bus is present

Advancing Transportation Through Innovation 5

slide-6
SLIDE 6

Understanding the Problem

Advancing Transportation Through Innovation 6

slide-7
SLIDE 7

Improving Driver Awareness around School Buses and School Bus Stops:

An Application of Connected Vehicle Technology

slide-8
SLIDE 8

Research Objectives

  • 1. Develop a concept for a CV system to

improve driver awareness around stopped school buses

  • 2. Evaluate drivers’ responses to an in-

vehicle “School Bus Stopped Ahead” message and similar static roadside signing.

Advancing Transportation Through Innovation 8

slide-9
SLIDE 9

Concept of Operations

Advancing Transportation Through Innovation 9

slide-10
SLIDE 10

Concept of Operations

  • 1. Messages presented to vehicles

approaching an occupied school bus stop

  • 2. Messages from school buses to other

vehicles in the vicinity

  • 3. Messages from stopped school buses

to approaching vehicles

Advancing Transportation Through Innovation 10

slide-11
SLIDE 11

Concept of Operations

  • 1. Messages presented to vehicles

approaching an occupied school bus stop

  • 2. Messages from school buses to other

vehicles in the vicinity

  • 3. Messages from stopped school buses

to approaching vehicles

Advancing Transportation Through Innovation 11

slide-12
SLIDE 12

Methods for Evaluation

  • 29 naïve subjects
  • Experimental Conditions
  • 1. Static roadside sign
  • 2. In-vehicle message

Advancing Transportation Through Innovation 12

Subject Matrix Male Female 20-35 years old 8 7 50-65 years old 7 7

slide-13
SLIDE 13

Test Route

  • On-road testing
  • 2 laps

(yellow/blue)

  • 1 condition per lap

– Diamond = sign – Star = in-vehicle

Advancing Transportation Through Innovation 13

slide-14
SLIDE 14

Vehicle Setup

  • VTTI naturalistic data

collection equipment

  • Camera Views
  • In-vehicle information

system

– Visual messages – Audible tones

Advancing Transportation Through Innovation 14

slide-15
SLIDE 15

Results

  • Comparisons of driver responses with

respect to:

– Speed – Longitudinal Acceleration – Jerk (change in accel)

  • All results were statistically significant
  • Direct comparisons between the sign

and message were not performed.

Advancing Transportation Through Innovation 15

slide-16
SLIDE 16

Results – Speed Profile

Roadside Sign In-vehicle Message

Advancing Transportation Through Innovation 16

* *

slide-17
SLIDE 17

Results – Acceleration Profile

Roadside Sign In-vehicle Message

Advancing Transportation Through Innovation 17

* *

slide-18
SLIDE 18

Results – Jerk Profile

Roadside Sign In-vehicle Message

Advancing Transportation Through Innovation 18

* *

slide-19
SLIDE 19

Limitations

  • Bus stop locations contained intrinsically

different characteristics

– Design speed, sight distance

  • In-vehicle messaged deployed

conservatively early

– 3.0 seconds reaction time on straight segment of road

  • Naturalistic driving limitations

– Novelty and observer effects

Advancing Transportation Through Innovation 19

slide-20
SLIDE 20

Conclusions

  • Developed and tested an in-vehicle

message to warn drivers that they are approaching a stopped bus.

– Nearly immediate driver response to the in- vehicle message – Dynamic response to the messages were numerically similar to the response after seeing a school bus – Drivers behaved conservatively after they received the message

Advancing Transportation Through Innovation 20

slide-21
SLIDE 21

Conclusions

  • The connected vehicle

system has the potential to greatly improve safety around school buses.

Advancing Transportation Through Innovation 21

slide-22
SLIDE 22

Questions?

Advancing Transportation Through Innovation