---
title: Speed Methodology and Validation
description: Vehicle speed is a critical metric that aids in transportation planning and management from areas of safety, roadway performance evaluation, and congestion monitoring
---

[![SLD-logo-homepage](https://learn.streetlightdata.com/hubfs/SLD-logo-homepage.png)](https://www.streetlightdata.com/)

WHITE PAPER

# Speed Methodology and Validation

##### Vehicle speed is a critical metric for safety planning, roadway performance evaluation, congestion monitoring, and more. But, it is expensive and time-consuming to collect speed data with sufficient time and location coverage.

##### StreetLight provides on-demand vehicle segment and spot speed metrics that enable a multitude of applications, from visualizing average speeds across a network to evaluating free-flow speed trends on a particular roadway.

##### Download our white paper to learn:

- Data sources and methodology used to estimate StreetLight’s speed metrics  
- How speed metrics compare to spot speed from surveys and permanent traffic detectors
- Validation results for speed on the highway and non-highway segments 

### Read White Paper

\*indicates a required field

![Speed validation](https://learn.streetlightdata.com/hubfs/Speed%20validation.png)

##### StreetLight average speeds show a strong correlation to DOT reported speeds, with a correlation coefficient of 0.96

![](https://learn.streetlightdata.com/hubfs/Logos/StreetLight-favicon-100x100.png)

Results from Speed White Paper, 2024

## Get on-demand vehicle speed data in a few clicks

![location-road](https://learn.streetlightdata.com/hubfs/Icons%20for%20Landing%20Pages/location-road.svg)

Access Speed data for any highway, local, or residential roads

![metrics-3](https://learn.streetlightdata.com/hubfs/Icons%20for%20Landing%20Pages/metrics-3.svg)

Easily get segment speed broken down by the time of the day and day of the week

![analytics-chart](https://learn.streetlightdata.com/hubfs/Icons%20for%20Landing%20Pages/analytics-chart.svg)

Visualize speed percentiles, including 85th and 95th percentiles

### Powering 10,000+ Projects Every Month

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### Speed Methodology and Validation

[Read White Paper](https://learn.streetlightdata.com/speed-whitepaper#form-section)