EP 0750774 B1 19980527 - METHOD OF DETECTING TRAFFIC AND TRAFFIC SITUATIONS ON ROADS, PREFERABLY MOTORWAYS
Title (en)
METHOD OF DETECTING TRAFFIC AND TRAFFIC SITUATIONS ON ROADS, PREFERABLY MOTORWAYS
Title (de)
VERFAHREN ZUR VERKEHRSERFASSUNG UND VERKEHRSSITUATIONSERKENNUNG AUF AUTOSTRASSEN, VORZUGSWEISE AUTOBAHNEN
Title (fr)
PROCEDE DE DETECTION DU TRAFIC ET DE SITUATIONS DE TRAFIC SUR DES AXES ROUTIERS, DE PREFERENCE SUR DES AUTOROUTES
Publication
Application
Priority
- DE 9500265 W 19950301
- DE 4408547 A 19940314
Abstract (en)
[origin: WO9525321A1] The invention relates to a method of detecting traffic and traffic situations on roads (AS), preferably motorways. Suitably arranged measuring points (measuring cross-sections MO1, MO2, ...) for vehicle detection using traffic sensors (VS) and a traffic data processing arrangement (VDVE) for traffic control are used to determine at regular intervals traffic data (VD), such as vehicle speed (v), traffic intensity (Q) and traffic density (K), and specific traffic parameters determined therefrom are formed in a traffic data processing system (VDA). Two adjacent measuring points (MQi, MQ(i+1)) form a measuring section (MA) of a given length (1). The following traffic parameters are formed from the traffic data (VD) of two such measuring points: a) the speed density difference (vk-D) calculated from the local traffic data of average speed (v) and traffic density (K); b) a separating factor (FT) which is continually formed from the ratio between the traffic intensities (Qi/Q(i+1)) of the first and second measuring points (MQi, MO(i+1)) but determined during a given period (t) in the minute range; c) the traffic intensity trend (QTi, QT(i+1)) of the respective measuring point (MQi, MQ(i+1)), the trend being derived from the increase of the tangent to the curve as a function of the traffic intensity (Q) over the time (curve Q(t)). The probability of a critical traffic situation (WG) is derived therefrom in fuzzy logic (FUB).
IPC 1-7
IPC 8 full level
G08G 1/01 (2006.01)
CPC (source: EP US)
G08G 1/0104 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9525321 A1 19950921; AT E166738 T1 19980615; DE 4408547 A1 19951012; DE 59502343 D1 19980702; EP 0750774 A1 19970102; EP 0750774 B1 19980527; FI 963627 A0 19960913; FI 963627 A 19960913; US 5696502 A 19971209
DOCDB simple family (application)
DE 9500265 W 19950301; AT 95910428 T 19950301; DE 4408547 A 19940314; DE 59502343 T 19950301; EP 95910428 A 19950301; FI 963627 A 19960913; US 70472896 A 19960912