The Network Screening application is designed to help users rank their entire roadway network in an easy-to-use interface.  The Network Screening application has 5 key features: Attribute Search, Segment Flyout, Roadway Ranking, Contextual Data, and the Network Screening report. Each feature is discussed in more detail below.

Attribute Search

Use Numetric’s powerful text-to-search feature to run custom roadway network screening requests. Search by recommended countermeasure, crash type, or any other crash or roadway attribute, and generate instant roadway rankings that tell you which roadways require your attention.

(A network analysis ranking roadways that would benefit from shoulder rumblestrips.)

Segment Flyout

Clicking on any segment in your network displays the Segment flyout, which contains current, and historical segment rankings, crashes by milepoint, a summary  of crash statistics (including number of crashes and fatal (critical) crashes, crash ratio, crash rate, crashes per mile, and location information), a summary of roadway details (including AADT, function classes, and any other roadway datapoint present in your data), and a list of recommended countermeasures for that segment.

(The Segment Flyout illustrating the segment rank crashes by milepoint, the summary, and part of the roadway details section.)

Roadway Ranking

Rank your selected segments by Crashes, Fatalities, Crash Rate, Crashes Per Mile, or ePDO, and see instant ranking results.

(The network ranking table. Users can sort and rank their network by any listed column of data.)

Contextual Data

With photos and Google Streetview, users can explore selected segments, and even see how each segment has changed over time, all without leaving the app.

Network Screening Report

Generate a downloadable Network Screening Report which contains the network ranking, and a breakdown of each segment, including the crash rate, crash ratio, crashes per mile, fatality rate, and serious rate, and distribution of crashes along the segment grouped by severity, as well as a stacked bar chart indicating the mile point at which the crashes occurred.

Sliding Window Analysis

In addition to a segment analysis, Network Screening - Segments also allows users to generate a Sliding Window analysis. Sliding Window analysis is a frequency-based Network Screening approach that helps users determine where the most crashes are occurring along their roadway network in a given sized window. Sliding Window analysis allows users to customize the length of the window for evaluation, anywhere from a .1 up to a 1 mile window (the default window length is set to .3 miles). Sliding Window allows users to rank their windows according to Crash Rate, Fatalities, Crashes, ePDO, or any other ranking criteria available for their organization.

The windows are then displayed in the ranking table on the right side of the screen, and each window is plotted on the map, color-coded according to percentile. 

For more information on how to run a Sliding Window analysis, see the Network Screening - How to Generate a Sliding Window Analysis article.

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