Abstract

Researchers obtained and processed probe speed data from HERE Technologies and integrated them with the Kentucky Transportation Cabinet’s highway inventory to develop congestion and travel time reliability performance metrics. This report summarizes analyses conducted using HERE speed data for 2022 – 2023. HERE data were processed using an established methodology, after which they were aligned with Kentucky’s highway inventory network. Analysis found that 2022 – 2023 HERE data offer significant improvements in coverage and quality over previous years. For locations that lacked sufficient data, researchers used HERE’s speed model to estimate hourly speeds. Data were used to calculate congestion and travel time reliability measures — including cost of delay and cost of unreliable travel time — that will inform the SHIFT 2026 prioritization process.

Report Date

8-2025

Report Number

KTC-26-04

Digital Object Identifier

https://doi.org/10.13023/ktc.rr.2026.04

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