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The SAFESPOT Project is co-funded by the European Commission Information Society and Media and supported by EUCAR.

Use Cases

A user centred design approach was followed for the formulation of the SAFESPOT Use Cases. In order to collect a proper set of User Needs and Requirements - and also as a general foundation for the overall analysis a Structured Analysis tool was used to describe the SAFESPOT system by means of the adoption of Use Cases.

For detailed information on the SAFESPOT applications and use cases please refer to the SAFESPOT Deliverable 8.4.4 "Use cases, functional specifications and safety margin applications for the SAFESPOT Project"

Intersection Safety application

Six Use Cases have been collected regarding the Intersection Safety application:

  • Accident at intersections
  • Obstructed view at intersection
  • Permission denial to go-ahead
  • Defect traffic signs
  • Other vehicle brakes hard due to red light
  • Approaching emergency vehicle warning

Example use case (for more information please click on the figure below):

ISA

Lane Change Manoeuvre

Three Use Cases have been synthesized for the Lane Change Manoeuvre application:

  • Lane Change Manoeuvre for trucks with blind spots
  • Lane Change Manoeuvre for car/trucks
  • Lane Change Manoeuvre for ramp in motorways

Example use case (for more information please click on the figure below):

LCM

Safe Overtaking application

Three Use Cases have been realized for this application:

  • Safe overtaking in urban and semi urban roads with PTWs (Powered Two Wheelers) -already while overtaking the Other Vehicle (OV)
  • PTW overtaking OV while OV is turning left to park area
  • PTW overtaking OV while a different OV is turning left to park area

Example use case (for more information please click on the figure below):

SOA

Head On Collision Warning

Three Use Cases have been collected for the Head On Collision Warning function:

  • Head On Collision Warning due to hazardous overtaking attempt by host vehicle
  • Head On Collision Warning due to hazardous overtaking attempt by a second vehicle
  • Head On Collision Warning due to the presence of a coach vehicle climbing down through a hairpin curve

The first Use Case is related to a situation where the host vehicle attempts an overtaking manoeuvre and is facing the risk of a head on collision due to the approaching of a second vehicle from the opposite lane. The second Use Case describes the same situation, but the perspective (host vehicle) is the one of the vehicle which is driving normally and is facing the head on collision risk due to a hazardous overtaking attempt started by a second vehicle. The third Use Case is referring to a completely different situation, where the risk of a head on collision is due to the presence of a coach climbing down through a hairpin curve.

Example use case (for more information please click on the figure below):

HOCW

Rear End Collision

Two Use Cases have been identified for the Rear End Collision application:

  • Rear End Collision due to the presence of a heavy vehicle climbing up through an hairpin curve at a low speed
  • Rear End Collision due to the presence of a slower vehicle at the end of a hilly road segment

Example use case (for more information please click on the figure below):

REC

Speed Limitation and Safety Distance

Three Use Cases have been identified for the Speed Limitation and Safety Distance application:

  • Speed Limitation and Safety Distance and trucks driver recommendations
  • Safety Margin Assistant on black spots – tunnels
  • Safety Margin Assistant on black spots – reduction of lanes

Example use case (for more information please click on the figure below):

SLASD

Frontal Collision Warning

Three Use Cases have been collected for the Frontal Collision Warning application:

  • Frontal collision warning due to a static obstacle in front
  • Frontal collision warning due to a static obstacle in a tunnel
  • Frontal collision warning due to abnormal vehicle behaviour in front

Example use case (for more information please click on the figure below):

FCW

Road Condition Status

Two Use Cases have been collected regarding the Road Condition Status – Slippery Road application:

  • Road Condition Status – V2I Based
  • Road Condition Status - V2V Based

Example use case (for more information please click on the figure below):

RCS

Curve Warning

One Use Case has been realized for the Curve Warning application:

  • UC9a - Curve Warning in rural black spots, based on a transponder in the infrastructure keeping memory of the speeds adopted by passing vehicles.

For more information on this use case please click on the figure below.

CW

Vulnerable Road User Detection and Accident Avoidance

The Vulnerable Road User Detection and Accident Avoidance function is the single function belonging to the VURU cluster of applications. For this application three Use Cases have been collected (first two belonging to the same situation related to the VRU crossing a road):

  • Vulnerable Road Users crossing a road, based on on-board detection system
  • Vulnerable Road Users crossing a road, based on environment analyses
  • Vulnerable Road Users in blind spots of a truck

Example use case (for more information please click on the figure below):

VRUDAAA