摘要:
In one embodiment, a method for intersection MAP message creation for vehicle communication is provided. The method includes receiving, over a network, map datafor an intersection. A processor calculates a reference point location for the intersection from the map data and calculates offset values relative to the reference point location for a plurality of lanes of the intersection from the map data.
摘要:
Aspects of the present disclosure include a navigation system and computer-implemented methods for proactively re-routing vehicles to control traffic flow. Consistent with some embodiments, the navigation system seeks to reduce traffic flow along primary navigation routes (e.g., routes with relatively short travel times) by re-routing vehicles to alternative navigation routes (e.g., routes with relatively longer travel times) using incentives. As an example, upon detecting a vehicle traveling along an alternative route instead of a primary route, the navigation system updates a data structure that represents a user account of a vehicle occupant to reflect an increased account balance. Consistent with some embodiments, the amount of value provided to an occupant of a vehicle traveling along an alternative routes may be obtained from user accounts of occupants of other vehicles that are traveling along a primary route.
摘要:
A method for estimating the occupancy of a parking lot is provided wherein map data, indicating the geometry of a parking lot, is obtained. A number of parking regions within said parking lot is then determined using said map data. A model of the spatial distribution of occupied parking regions is then generated as a function of the total number of occupied parking regions within the lot. The method further comprises receiving probe data from a plurality of portable devices within said parking lot, wherein said probe data indicates the position of each device. The probe data is analysed in accordance with said model and an estimate of the occupancy of the parking lot is output.
摘要:
Road geometries may be determined from sparse data by receiving mobile device data points comprising data indicating positions of vehicles having traveled on a roadway of a geographic area, the roadway involving a convergence or divergence of road branches for the roadway. At least one trajectory angle for a particular mobile device data point of the mobile device data points may be determined using at least one trajectory line connecting the particular mobile device data point to an adjacent mobile device data point, and mobile device data points may be grouped based on the trajectory angles.
摘要:
The present disclosure relates to methods and systems to manage traffic density in a transportation system, and by doing so, maintain, in one embodiment, traffic flows near optimum levels to maximize road capacity and minimize travel times. The method includes, in one embodiment, a mechanism for vehicles to request road access from a centralized control, a queuing system that allows road access to be granted to individual vehicles over an extended period of time in a fair and organized fashion, a measurement system that allows traffic flow and density throughout the system to be determined in real-time, and an enforcement and fraud prevention mechanism to ensure that the rules and permissions imposed by the system are followed.
摘要:
Embodiments describe new mechanisms for signalized intersection control. Embodiments expand inputs beyond traditional traffic control methods to include awareness of agency policies for signalized control, industry standardized calculations for traffic control parameters, geometric awareness of the roadway and/or intersection, and/or input of vehicle trajectory data relative to this intersection geometry. In certain embodiments, these new inputs facilitate a real-time, future-state trajectory modeling of the phase timing and sequencing options for signalized intersection control. Phase selection and timing can be improved or otherwise optimized based upon modeling the signal's future state impact on arriving vehicle trajectories. This improvement or optimization can be performed to reduce or minimize the cost basis of a user definable objective function.
摘要:
Data indicative of a plurality of duration times is obtained, each duration time relating to a dynamic POI of a set of a plurality of dynamic POIs that have a similar location, and are of similar type. Each duration time is in respect of a given time. The data indicative of each duration time is representative of a difference between a time at which the dynamic POI was in an active state and a time at which the dynamic POI was in an inactive state. The obtained duration time data and the associated time data are used to obtain a duration time function indicative of a variation in duration time with respect to time. The duration time function is associated with data indicative of a given geographic location.
摘要:
Vehicles in transit within a location may transmit and/or receive information about transit events arising within the location, such as accidents, developing weather, and road obstructions. Because localized exchange channels, such as a radiofrequency broadcast, may be range-limited and/or unreliable, a centralized service may be provided to facilitate the exchange of notifications about transit events, but it may be difficult to provide a centralized service that is both scalable to millions of vehicles and capable of low-latency exchange of time-sensitive notifications for transit events. The techniques presented herein provide an architecture for broadcasting transit events through a transit service that maintains vehicle area groups, respectively identifying the vehicles that are associated with each location. The service may receive a notification of a transit event for a location, and may utilize the vehicle area group for the location to broadcast the notification to the other vehicles of the area group.
摘要:
Among other things, one or more techniques and/or systems are provided for providing users with access to a route for travelling. A user, of a client device, may send a request for access to the route to a route planning service. The route may correspond to a starting location and an ending location. The route planning service may query a route database to identify an entry indicating that a restricted access road segment (e.g., a high occupancy vehicle lane, a shoulder lane, a bus lane, etc.) and/or a road segment (e.g., comprising a traffic light alteration capability) exists between the starting location and the ending location. Responsive to successfully authorizing the user for travelling the restricted access road segment and/or the road segment, the route, comprising the restricted access road segment and/or the road segment, may be provided to the client device.