Wireless vehicle-to-vehicle communication would be required in new cars
theverge.com
theverge.com
What data is exchanged? The data, known as the “basic safety message” (BSM), is exchanged between vehicles and contains vehicle dynamics information such as heading, speed, and location. The BSM is updated and broadcast up to 10 times per second to surrounding vehicles. The information is received by other vehicles equipped with V2V devices and processed to determine collision threats. Based on that information, if required, a warning could be issued to drivers to take appropriate action to avoid an imminent crash.
Will drivers’ privacy be at riskw hen V2V is deployed? By design, the V2V system will not collect, broadcast, or share information linked or linkable, as a practical matter, to individuals or their vehicles. V2V-enabled vehicles exchange only generic safety information. The system is designed to operate without using any personal information about specific vehicles or drivers.
The details are at: http://www.safercar.gov/v2v/pdf/V2V%20NPRM_Web_Version.pdf See particularly "Proposed V2V Basic Safety Message (BSM) Content". This includes a 32-bit random id, transmitting 10 messages per second, to include time, lat/lng/elevation, speed, heading, acceleration, and yaw (yaw being the rate at which the vehicle’s direction is changing (i.e., the rate at which the vehicle’s face is pivoting towards the left or the right).
Range will be about 300 meters.
And this goody: A PER of less than 10% aligns with the ASTM standard E2213-03 (2003) 4.1.1.2 where “(2) DSRC devices must be capable of transferring messages to and from vehicles at speeds of 85 mph with a Packet Error Rate (PER) of less than 10 % for PSDU lengths of 1000 bytes and to and from vehicles at speeds of 120 mph with a PER of less than 10 % for PSDU lengths of 64 bytes.”
I expect real benefits when traffic lights could also transmit messages such as "Hey you people coming from the North and Sound, I'm going to turn red in 10 seconds."
And as an urban pedestrian, I want a portable unit. Sorry, Tesla owners, your "Ludicrous" mode may be periodically downgraded to "Meek and Mild" mode.