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How to View Corridor Patterns (Network Link-Level Data) in Replica
How to View Corridor Patterns (Network Link-Level Data) in Replica

In this tutorial, we demonstrate how you view data for network links (roadways) in Replica Places.

Lauren Massey avatar
Written by Lauren Massey
Updated over a week ago

Overview

Places are Replica's high-fidelity, disaggregate activity-based models that cover typical weekdays and weekend days over a 13-week modeling season and include detailed information about each trip and trip-taker, across all modes, with route-level detail. Each trip modeled in Places is assigned a set of routes (network links for trips that take surface modes and transit routes for trips that take non-surface modes).

In this tutorial, we'll walk through how you can view and download our network link data in the Replica platform. Network link volumes in the Places dataset represent average daily traffic (ADT) volumes for the given day and season you are viewing.

Note:

  • If you are looking for auto volumes with the highest level of accuracy as compared to Federal Highway Administration (FHWA) data, we recommend Replica AADT’s data product, as we scale AADT counts to match FHWA data. Click here to learn more about how to access this data.

  • If you want to understand network link volumes in addition to other mobility patterns, like origin and destinations, or demographics of the travelers passing through a route, we recommend using Places network link volume data.

Filtering your Study to show trips that pass through specific network links

In Places, you can leverage the Network Links filter to look at trips and travelers that pass through 1) any of network links you've selected; or 2) all of the network links you've selected. In the steps below, we walk through how to do this. Click here to view the example Study in the Replica platform. You can click "Make a copy" to make changes to this Study.

Step 1: Set up your Study

  • Access the "Studies" page in Replica's platform

  • Click "New Study" in the upper right-hand corner of the page

  • Name your study, select your megaregion, season, and day of the week (choose between seeing patterns for a typical weekday or weekend day) for which you'd like to see data

Step 2: Open the Network Link selection tool

Click on the "+" icon at the top of your study to find the "Network Links" filter from the list of available filters. Click on the "+" icon next to the filter.

Step 3: Select your network links

On the left-hand side of the network link selection tool, there is a "Trips Passing Through" dropdown where you can choose whether you'd like to filter trips that pass through any of your selected network links or filter trips that pass through all of your selected network links.

In this example, we'll choose steps that pass through all selected network links.

Next, zoom into the area of the megaregion where your network links are located and select them off of the map. In this example, we'll look at trips that pass through Tower Bridge Gateway West and Tower Bridge Gateway Southwest links in Sacramento, CA. Once we've selected the links off the map and clicked "Save" our Study will dynamically update to show trips and travelers that take both of these selected network links.

Step 4: Look at trip and demographic characteristics of these trips.

Now that we've filtered down to trips that pass through both of these network links, we can do a number of analyses with Places data. For example, we can:

  • Understand where these trips are starting and/or ending: Use the Map Layer Panel and toggle between "Trips by Origin" or "Trips by Destination" to visualize where these trips are starting or ending. If you want to see common O/D pairs, find the "Origin-Destination Pairs" module at the top of the Summary Panel, and you can adjust the geographic breakdown as desired for your analysis:

  • Look at the trip distances and durations: Use the "Trip Distance" and "Trip Durations" modules in the Summary Panel to see how long residents are traveling using these modes of travel.

  • Understand the mode split of these trips (or apply an additional filter to look at the trips that take a specific mode of travel): Use the "Primary Mode" module to understand the percentage of trips that are taken by private auto vehicle trips compared to commercial vehicle trips.

  • Look at the demographic characteristics of the travelers: Click on the "People" tab in the Summary Panel and see detailed information including household income, race and ethnicity, home location, private auto access, and more:

  • See what other network links these trips commonly use: In the Map Layer Panel, the Layer Data dropdown menu includes a "Network Link Volume" layer that will visualize the other network links used for the trips. You can hover over specific links and see the number of trips in your Study that passed through that specific link.

Step 5 (Optional): Download the data

Download the trip and population data for the trips and travelers passing through your selected network links:

Click the "Dataset" tab near the top left corner of your Study to download detailed records of the trips and travelers that meet your filter criteria. In this example, we've filtered down to ~6,730 trips and ~6,510 trip takers. The trip table will contain a detailed record of each one of these trips (via a unique activity_id), including origin and destination points, trip purpose, and more. The population table will contain an individual record of each trip taker (via a unique person_id), including detailed individual and household characteristics, like income, race and ethnicity, home and work location, and more.

Download the network link volume data: Turn the "Network Link Volume" map layer on in the Map Layer panel and click "Download Layer Data" to download data related to network link volumes for your study.

You have the option to download trip volumes for all network links that the trips in your Study (note: this download will pull volumes for the top 100,000 network links) or you can download trip volumes for your selected network links, only. You have the option to download in .csv or geospatial file formats.

Visualizing network links taken for the trips and travelers that meet your filter criteria

In Studies, you can turn on the "Network Link Volume" map layer to see what roads are most commonly used for the trips that meet your filter criteria.

See an example Study here where we visualize network link volumes for commercial vehicle (freight) trips ending in Jackson County, MO. Once we have filtered to a specific destination point and set a primary mode filter of commercial vehicle trips, we update the select "Network Link Volumes" from "Layer Data" dropdown in the left-hand Map Layer panel.

As you zoom into different roads, you can hover over specific links and see the number of trips in your Study that passed through that specific link.

As noted above, you can click "Download Layer Data" to download the network link volume data you are visualizing on the map. You can download in .csv or geospatial file formats.

Downloading network link volumes by total volume, mode, trip purpose, or trip start time

Network Link Volume Download: This tool is powered by Places data and shows trip volumes broken down by mode, trip purpose, or trip start time, for all trips occurring in a specific geography. You can use this tool to see the most common roads used for certain modes of travel, for example.

Have questions?

Click on the chat icon in the lower right-hand corner of our platform or email support@replicahq.com.

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