Dangerous lane strands
AssigneeHERE Global B.V.
InventorJames Fowe
Life of this patent
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Abstract
An apparatus and method are disclosed for calculation of a dangerous road strand of a roadway. Probe data for a roadway having multiple lanes is identified. A subset of the probe data for a predetermined lane is selected and values for a change in velocity for multiple sequences in the subset of probe data are calculated. Based on clustering for the change in velocity and a danger value, the dangerous road strand is identified. The dangerous road strand is stored in a geographic database in association with the lane for the roadway.
Claims20
A method for identifying a road strand, below a baseline safety level, of a roadway to reduce driving errors or accidents, the method further comprising:
- identifying probe data for a roadway having a plurality of lanes;
- selecting a subset of the probe data for a predetermined lane of the plurality of lanes;
- calculating values for a change in velocity between a first velocity and a second velocity, over a predetermined time interval or a predetermined distance interval, for multiple sequences in the subset of the probe data;
- clustering values for the change in velocity between the first velocity and the second velocity, over a predetermined time interval or a predetermined distance interval, based on a danger value;
- identifying the road strand, below the baseline safety level, from the clustered values;
- and
- storing the road strand, below the baseline safety level, in a geographic database in association with the predetermined lane for the roadway.
An apparatus for identifying map data including at least one road strand, below a baseline safety level, of a roadway to reduce driving errors or accidents, the apparatus further comprising:
- a road network module configured to identify probe data for a roadway having a plurality of lanes and select a subset of the probe data for a predetermined lane of the plurality of lanes;
- a speed comparison module configured to calculate values for a change in velocity between a first velocity and a second velocity, over a predetermined time interval or a predetermined distance interval, for multiple sequences in the subset of the probe data;
- a clustering module configured to cluster values for the change in velocity between the first velocity and the second velocity, over a predetermined time interval or a predetermined distance interval, based on a sudden braking value;
- and
- a road strand module configured to identify the road strand, below the baseline safety level, from the clustered values.
A non-transitory computer readable medium for identifying a road strand, below a baseline safety level, of a roadway to reduce driving errors or accidents, the medium including instructions that when executed by a processer are configured to perform:
- identifying probe data for a roadway having a plurality of lanes;
- clustering values for a change in velocity between a first velocity and a second velocity, over a predetermined time interval or a predetermined distance interval, based on the probe data;
- identifying a lane for the plurality of lanes for a road strand, below the baseline safety level, from the clustered values;
- and
- storing the road strand, below the baseline safety level, in a geographic database in association with the identified lane for the roadway.
A method for identifying a road strand, below a baseline safety level, of a roadway to reduce driving errors or accidents, the method comprising:
- identifying probe data for a roadway having a plurality of lanes;
- selecting a subset of the probe data for a predetermined lane of the plurality of lanes;
- calculating values for a change in velocity for multiple sequences in the subset of the probe data;
- calculating a danger value (DV) according to a relationship,
- DV=|AD|*F÷Q, wherein an average deceleration (AD) is the change in velocity, a frequency (F) is a number of clustered measurements and a trajectory quantity (Q) is a number of total probes;
- clustering values for the change in velocity based on the danger value;
- identifying the road strand, below the baseline safety level, from the clustered values;
- and
- storing the road strand, below the baseline safety level, in a geographic database in association with the predetermined lane for the roadway.
Dependencies are inferred from the claim text.