Headway Monitoring and Warning

Insufficient distance keeping is a major source of rear-end accidents. The importance of keeping sufficient headway for reduction of accidents is recognized by traffic authorities worldwide and is being enforced in an increasing number of countries. Headway is defined as the time it will take to reach the current position of a vehicle driving ahead, and is calculated by dividing the distance to the vehicle ahead with the travel speed of the host vehicle.

View HMW Video

The Headway Monitoring Warning system is based on Mobileye’s series level Vision-only Vehicle Detection system, which operates in all light and weather conditions,  and recognises the preceding vehicles in the host vehicle’s lane and adjacent lanes and provides accurate range estimation for the targets. Mobileye's threat assessment identifies the Closest In Path Vehicle (CIPV) and from it s range and current speed the headway estimation in Seconds is derived. The HMW feature level notifies the driver of the current headway and provides a warning should a preset threshold be passed.

As with all Mobileye features HMW works in all weather and light conditions and has been in production since 2007 as part of Mobileye's Advance Warning System (AWS). HMW is currently part of Mobileye's OEM series developments for launch from 2011 onwards for major global vehicle makers, including:

- EyeQ2, Lane Departure Warning (LDW) + Forward Collision Warning (FCW) + HMW + Intelligent Headlight
  Control (with adaptive ranging function - IHC) + Traffic Sign Recognition (TSR)
- EyeQ2, LDW + FCW + HMW + IHC + TSR