Patent ID: 11893883
Assignee: ITERIS, INC.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A method, comprising:
modeling spatio-temporal dependencies in traffic speed from input data comprised of probe data that includes localized, historical link-based speed information in a transportation network, and incident data that includes roadway maintenance activity within the transportation network, by:
selecting one or more predictors from features in the input data relevant to each link in the transportation network,
predicting short-term traffic speed for each link, by constructing a matrix defined by a number of time steps, and a plurality of features representing temporal characteristics in the one or more predictors selected for each link, and generating a multi-variate time series dataset for each link from the matrix,
estimating a traffic speed at one or more locations of the transportation network at one or more specified times where either a work zone is conducted or where a maintenance vehicle is operating, by applying the multi-variate time-series dataset to a multi-layered neural network to transform differential time sequences in the multi-variate time-series dataset, the multi-layered neural network having a sequence-to-sequence architecture comprised of an encoder generating a hidden neural network state representing the multivariate time-series data, a decoder generating an output sequence, and a fully-connected layer; and

analyzing an estimate of the traffic speed at the one or more locations of the transportation network to predict traffic bottlenecks where either the work zone is conducted or where the maintenance vehicle is operating at the one or more specified times, the traffic bottlenecks representing predicted delays characterized by a reduction in traffic speed where the roadway maintenance activity occurs,
wherein one or more of: an operation of the maintenance is autonomously controlled, a route of the maintenance vehicle is remotely updated and performed, or a recommended route is updated for routing of roadway vehicles in or near the work zone, from the estimate of the traffic speed.