Emergency Vehicle Traffic Control System Ryan Goldade Leon
- Slides: 30
Emergency Vehicle Traffic Control System Ryan Goldade Leon Chang Jun Kim Tae-Hoon Kim Kelvin Liu CEO CTO COO CMO CFO December 15, 2008
Overview n n n n The Problem Our Solution System Overview Commercialization Budget and Timeline Future Development Conclusion Questions & Answers
The Problem n n EMV are often delayed by civilian vehicle operators Flashing lights and siren do not ensure the right-of-way EMV entering intersections on red lights In some cases drivers do not pay attention or they may not know how to react when an EMV approaches
The Problem “Two dead after police car collides with vehicle at intersection”
The Problem
Our Solution GPS Signal Traffic Light Control Vehicle Location Wireless Data Transmission to Traffic Light
Our Solution n Allow faster and safer response to emergencies Avoid miscommunication between drivers Eliminate the need of running a red light Ensure the EMV operator has the right-of-way n Clear out traffic directly in front of the EMV n n n
System Overview GPS Module EMV’s position RF Module Traffic Light Preemption Instructions Traffic Light Module
System Overview The project is composed of 3 modules: n GPS Module n n RF Module n n n Acquire EMV’s position Transmitter : Filter and transmit useful GPS data to the receiver Receiver : Perform traffic-light-preemption calculations Traffic Light Module n Maintain operation of a functioning intersection
System Overview GPS Module n n n Chip used: ZX 4120 Reacquisition Time: 0. 1 seconds Track up to 16 satellites Accuracy within average of 7 meters Asynchronous serial communication Baud Rate 9600 Data Bits 8 Parity None Stop Bits 1 Flow Control None
System Overview GPS Module – NMEA Messages n Messages being sent to RF Module Transmitter Prefix Format $GPGGA GPS fix data $GPGLL Geographic position $GPGSA GNSS DOP and active satellites $GPGSV Satellites in view $GPRMC Recommended Minimum specific GNSS data $GPVTG Velocity and track over ground $GPZDA Data and Time
System Overview RF Module n n n Input: Position of emergency vehicle Output: Traffic light preemption instructions Interface Used: RS 232 serial I/O port
System Overview RF Module - Transmitter n n Relays GPS position to traffic light preemption controller (RF Receiver) Only transmit GPS message with the prefix $GPRMC. This message includes: n n Longitude, latitude, time and speed Message is transmitted to the receiver @ default settings: n n Frequency: Data Rate : 868 MHz 38. 4 kbps
System Overview RF Module - Receiver n Received packet is validated by: n n n Length Network ID CRC 16 Sequence number Extract latitude and longitude Calculate vehicle direction from EMV distance to intersection n n Distance decreasing = Approaching intersection Distance increasing = Exiting intersection
System Overview RF Module – Receiver – Car detection
System Overview Traffic Light Module n n n For demonstration purposes only Maintain operation of a functioning intersection Determines which lights are active for each direction of the intersection Employ timer to switch direction of traffic flow Two modes of operation: n n Regular Mode Emergency Mode n n Handle the event of an EMV approaching Triggered by RF Module
System Overview Traffic Light Module – Regular Mode
System Overview Traffic Light Module – Emergency Mode n When an EMV is approaching an intersection n A character keystroke is sent from the RF Receiver to activate Emergency Mode Keystroke Note N EMV approaching from North S EMV approaching from South E EMV approaching from East W EMV approaching from West
System Overview Traffic Light Module – Emergency Mode n When an EMV is exiting the intersection n A character keystroke is sent from the RF Receiver to deactivate Emergency Mode Keystroke Note q EMV exits intersection
System Overview Traffic Light Module – Emergency Mode
Commercialization Business Opportunities n City Planning Project n n Integrate with public transit n n New infrastructure Improve service efficiency Incentives for insurance companies n Enhance road safety
Commercialization Component Cost RF Module (Per Intersection) RF Chip + Antenna $49. 50 Subtotal $49. 50 GPS Module (Per Vehicle) GPS Chip $44. 90 Antenna $12. 90 RF Chip + Antenna $49. 50 Subtotal $107. 30 Note: - All prices are in USD - Installation cost are not included - Price of Traffic Light Module is omitted since it’s for demonstration only
Commercialization Product Package and Installation Intersection Cost (15, 000 intersections) Retail Quote ($100 per unit) $150, 000 GPS Module (Per Vehicle) (400 EMVs) Retail Quote ($250 per unit) $100, 000 Integration and Installation Retail Quote ($75 per work hour) $250, 000 Total $500, 000 Note: - All prices are in USD
Budget Components Market Price Project Cost GPS Module GPS Chip $44. 90 GPS Antenna $12. 90 $57. 80 $650 $0. 00 Included in dev kit $0. 00 $650 $0. 00 $440 $0. 00 Batteries $20. 00 LEDs $25. 00 Cables $20. 00 Subtotal $65. 00 $1213. 80 $122. 80 Subtotal RF Module 2 x RF Dev Board 2 x RF Evaluation Kit (includes antenna) Subtotal Traffic Light Module Cypress MCU Dev Board Miscellaneous Total
Timeline Project Milestone
Timeline Schedule n Gantt chart
Future Development n n Longer RF transmission range (~200 m) Central intelligent unit to maintain operation during GPS dropout Integrate with GPS trip planner Implement advanced green and pedestrian crosswalk control
Conclusion n What we learned n n n Time management Project planning, documenting and testing Module Integration Software Engineering Soldering
Acknowledgements n n n ESSS Ciber Lab Al Lund n n Spencer Mac. Donald n n Pacific Safety Centre Const. Mitch La Framboise n n BC Safety Council ICBC Justice Institute Terry Swain n n Pacific Traffic Education Center Abbotsford PD Andrew Rawicz and Mike Sjoerdsma (and company)
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