Method, apparatus and computer program product for defining a strand upstream of a direction-based traffic link

A non-transitory computer-readable storage medium having computer program code instructions stored therein, the computer program code instructions, when executed by at least one processor, cause the at least one processor to:

• for each of a plurality of time epochs, determine a representation of a turning speed in a downstream direction for traffic in each of a plurality of lanes of a link immediately upstream of a direction based traffic (DBT) intersection;
• for each of the plurality of time epochs, determine a ratio of a first representation of the turning speed for traffic in a first lane of the link to a second representation of the turning speed for traffic in a second lane of the link;
• determine a speed ratio for the DBT intersection based upon the ratios that are determined for each of the plurality of time epochs;
• prioritize one or more DBT intersections for DBT topology stranding based upon the speed ratio for the one or more DBT intersections;
• obtain traffic information for the one or more DBT intersection;
• define, based on the prioritized one or more DBT intersections, a route that provides lane level guidance to a driver or a vehicle indicating a lane of a link of a DBT intersection of which the vehicle should travel, the route indicating the traffic information;
• provide to the driver or the vehicle via a user interface, the route;
• and
• provide the traffic information on a user interface.

An apparatus comprising at least one processor and at least one non-transitory memory including computer program code instructions, the computer program code instructions configured to, when executed, cause the apparatus to:

• for each of a plurality of time epochs, determine a representation of a turning speed in a downstream direction for traffic in each of a plurality of lanes of a link immediately upstream of a direction based traffic (DBT) intersection;
• for each of the plurality of time epochs, determine a ratio of a first representation of the turning speed for traffic in a first lane of the link to a second representation of the turning speed for traffic in a second lane of the link;
• determine a speed ratio for the DBT intersection based upon the ratios that are determined for each of the plurality of time epochs;
• select one or more DBT intersections for DBT topology stranding based upon the speed ratio for the one or more DBT intersections;
• obtain traffic information for the one or more DBT intersection;
• define, based on the prioritized one or more DBT intersections, a route that provides lane level guidance to a driver or a vehicle indicating a lane of a link of a DBT intersection of which the vehicle should travel, the route indicating the traffic information;
• provide to the driver or the vehicle via a user interface, the route;
• and provide the traffic information on a user interface.