Electrical and Computer Engineering

10/19/06

DSRC Accident Warning System at Intersection

Richa Prasad ● Raza Kanjee ● Hui Zhu ● Thai Nguyen

Professor Prishro-NikAdvisor, Assistant Professor, ECE

Professor NiAdvisor, Assistant Professor, CEE

Team Pishro-Nik & Ni

2Electrical and Computer Engineering

10/19/06

Background

These situations at intersections represent about:

• 65% of injury accidents

• 70% of fatal accidents

Annual fatality rate > 40,000 for more than 30 years

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3Electrical and Computer Engineering

10/19/06

DesignVII DSRC

• Vehicle Infrastructure Integration

Entertainment

Safety

Traffic

Routing

Weather

Tutor • Dedicated Short Range Communication

• 5.9 GHz Frequency Band

• Allocated for VII

• IEEE Standard: 802.11p

Path Suggestion

Speed Suggestion

Pedestrian Warning

Traffic Management

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4Electrical and Computer Engineering

10/19/06

DeliverablesRSU is

warned of traffic light turning red

Message sent to red car asking for speed

and position

OBU sends back speed and location

RSU calculates

whether red car will run

red light

If yes, blue car warned

1

2

3

4

GOALS

• Real-life demonstration

• Running light warning only

• Simulation of two cars

• Technical Documentation

© PReVENT © PReVENT

5Electrical and Computer Engineering

10/19/06

Principle of Operation

Traffic Light

RSU

Speeding Car

Waiting Car

5 V Power Supply

External Clock

Simulated on Microcontroller

OBU

GPS

OBU

Laptop

TransceiverInformation Signal

Control Signal

Power Supply

SpeedLocation

Log dataTransfer

Do Nothing

Calculate if car will run

red light

Traffic light turning red?

No

Yes Alarm signal

Alarm signal

Laptop

Transceiver

Laptop

Transceiver

6Electrical and Computer Engineering

10/19/06

Input/Output

GPS5 V Power Supply

Traffic Light

Simulated on Microcontroller

5 V Power Supply

External Clock

Laptop

RS232 Serial Port

O

B

ULaptop

INPUT

Speeding Car Waiting Car

GPS

Laptop

Transceiver

Laptop TransceiverAlarm signal

OUTPUT

7Electrical and Computer Engineering

10/19/06

Acceptance Test

• Successful one speeding car demonstration

• Successful warning of car running red light

• Successful real-life demonstration

8Electrical and Computer Engineering

10/19/06

Product Cost

9Electrical and Computer Engineering

10/19/06

Design Alternatives

Traffic Light

Simulated on Microcontroller

5 V Power Supply

External Clock

RSU

Laptop

Transceiver

Speeding Car

GPS

OBU

Laptop

Transceiver

Waiting Car

OBU

Laptop

Transceiver

Information Signal

Control Signal

Power Supply

• Laser Sensors

• Video Camera

• RFID Detection

• Speed Gun

GPS Alternatives

• Bridge

Transceiver Alternative

• Microcontroller

Laptop Alternative

• Expansion of Project

• Beyond Scope

• Beyond Scope

• Not accurate

• No location

• Too expensive

10Electrical and Computer Engineering

10/19/06

Proposed MDR Specifications

Aim Acceptability Test

Transceiver Set-Up Random information successfully transmitted and received

Traffic Light Successfully simulates a traffic light. Implemented on a microcontroller

GPS-Laptop Communication Speed and location of car successfully sent to OBU laptop

11Electrical and Computer Engineering

10/19/06

Proposed MDR SpecificationsApproach

Challenges

• GPS

- Serial Port Communication

Protocol

- Learn NMEA Data Protocol

• Transceiver

- Serial Port Communication

Protocol

- Learn TCP/IP

• Traffic Light

- Microcontroller Programming