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abstract indexed · arXiv 2609.29906 · updated 2026-10-18

Spatio-temporally complementary feature propagation on graphs for longitudinal AADT estimation

First page of Spatio-temporally complementary feature propagation on graphs for longitudinal AADT estimation
From the original paper · arXiv 2609.29906Page 1. Select the image to read the PDF.

The method replaces reliance on dense physical sensor coverage by propagating sparse loop-detector measurements over a directed road graph, using flow-ratio matrices instead of a binary adjacency matrix and solving a Poisson energy minimization with residues, anchored by a spatially complete but temporally sparse macroscopic transportation model. It costs little computationally (convergence in minutes on standard hardware) but requires two specific inputs: loop detector data and a calibrated city-scale transportation model with intersection turn ratios. It can fail where turn-ratio estimates are inaccurate, where the macroscopic model is systematically biased, or in cities lacking either data source, and the sub-10% error is validated on a single city.

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Graph feature propagation for AADT estimation
published
2026-09-24

This is a transportation-engineering graph method tied to domain-specific sensor and traffic-model data, with no bearing on LLM training, inference, or agent systems on constrained infrastructure.

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    The method replaces reliance on dense physical sensor coverage by propagating sparse loop-detector measurements over a directed road graph, using flow-ratio matrices instead of a binary adjacency matrix and solving a Poisson energy minimization with residues, anchored by a spatially complete but temporally sparse macroscopic transportation model. It costs little computationally (convergence in minutes on standard hardware) but requires two specific inputs: loop detector data and a calibrated city-scale transportation model with intersection turn ratios. It can fail where turn-ratio estimates are inaccurate, where the macroscopic model is systematically biased, or in cities lacking either data source, and the sub-10% error is validated on a single city.

    This is a Paperraft inference. It is not pinned to a verified PDF passage.

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  2. claim 02Paperraft inference

    Normalized mean absolute error below 10% for network-wide AADT estimation in Zurich, with convergence within minutes.

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arXiv 2609.29906

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