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What are Mile Markers in 4Map?

Learn about Mile Markers in 4Map and how they help you during your infrastructure planning.

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Written by Nicole Heger
Updated over a month ago

About Mile Markers

Mile Markers in 4Map allow you to search, view, and create projects using official Department of Transportation mile marker systems. This feature aligns 4Map with standard DOT and route-based workflows by enabling users to locate project areas the same way they are defined in letting documents, plans, and GIS applications.

Mile Markers act as precise reference points along highways, making it faster and more accurate to find locations, describe project limits, and create projects directly on the correct roadway geometry.

When to Use Mile Markers

Mile Markers are especially useful when:

  • Working on DOT projects described in letting or scoping documents

  • Locating assets or work areas along highways

  • Creating projects defined by distances relative to known highway reference points

Viewing the Mile Marker Layer

Toggle On the Mile Marker Layer

You can view Mile Markers both before creating a project and within an existing project.

  1. Open the map in 4Map.

  2. Open the Layers panel.

  3. Toggle Mile Markers on.

Once enabled, Mile Markers appear along highways. As you zoom in, marker labels and details become visible.

Tip: Zooming closer reveals the full marker label, including county shorthand, route number, and mile value.

Searching for a Mile Marker

You can search directly for a specific Mile Marker to jump to an exact location on the map.

How to Search:

  1. Click into the Search bar.

  2. Enter a Mile Marker using route and mile value (for example: 5 15.2).

  3. Select the result from the list.

The map will automatically pan and zoom to the precise Mile Marker location.

This allows you to quickly navigate to DOT-defined reference points without manually scanning the map.

Using Mile Markers During Project Creation

Mile Markers can be used while creating a new project to help identify and confirm the project location.

During Project Setup

  • Enable the Mile Marker layer while defining your project area.

  • Use search to navigate to a specific Mile Marker.

  • Use visible Mile Markers as reference points to draw or confirm project boundaries.

This workflow ensures your project location matches how the DOT defines and communicates project limits.

Why This Matters

For DOT Users

  • Matches existing DOT workflows and terminology

  • Improves accuracy when locating project areas

  • Reduces time spent cross-referencing external GIS tools

For AEC Firms Supporting DOTs

  • Aligns project setup with letting documents and DOT instructions

  • Reduces interpretation errors

  • Builds trust and consistency when collaborating with DOT stakeholders

Need Help?

If you have questions about Mile Markers or need help using them in your projects, contact your 4M Customer Success Manager.

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