Home Internet of Things Aerospace Apparel Energy Defense Health Care Logistics Manufacturing Retail

Ask The Experts Forum

BlogsAsk The Experts ForumCould RFID Tags Protect Pedestrians and Bike Riders From Being Hit By a Car?

Could RFID Tags Protect Pedestrians and Bike Riders From Being Hit By a Car?

Posted By RFID Journal, 11.19.2012
Do you have any recommendations about placing a radio frequency identification reader within a car that could alert a driver if an RFID transponder on a bicycle or pedestrian came within a certain range (perhaps 25 feet)? It would be very simple, because the reader would only need to determine location. So could I get something like this cheaply?

—Name withheld

I don't think RFID would be the appropriate technology for this application. For it to work, you would need to somehow get all pedestrians and bike riders to wear RFID tags, which I can't see everyone doing voluntarily.

In addition, it would not be easy to determine an object's location within the read field of a conventional ultrahigh-frequency (UHF) RFID reader. Distance is ascertained using a received signal strength indicator (RSSI). The signal strength can be affected by environmental conditions. So if it were raining, it might not be possible to read a tag from 25 feet away. What's more, if there were metal under the pavement, you might get a reflection of the radio waves that could affect the ability to determine distance in unpredictable ways.

Active tags broadcast a signal, and it might be possible to create a system that could determine distance more accurately—but such a solution would be expensive. Buying a tag for every pedestrian at a cost of $10 or more apiece would be very costly, indeed.

—Mark Roberti, Founder and Editor,
RFID Journal

Login and post your comment!

Not a member?

Signup for an account now to access all of the features of RFIDJournal.com!

Next Post
How Are Static and Combined Data Authent...
Previous Post
Can a UHF Gen 2 RFID Tag's Password Be C...
Case Studies Features Best Practices How-Tos
Live Events Virtual Events Webinars
Simply enter a question for our experts.
RFID Journal LIVE! RFID in Health Care LIVE! LatAm LIVE! Brasil LIVE! Europe RFID Connect Virtual Events RFID Journal Awards Webinars Presentations