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Section 2: Divided Highway Intersections and Crossovers

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Introduction

Intersections at divided highways and crossovers between directions of a divided highway have special signing needs due to the complexity of the intersecting area. Medians with widths of 30 ft or more are signed as two separate intersections (Texas MUTCD Section 2A.23). The figures in this section illustrate placement of signs such as One-Way, Do Not Enter, Route Assemblies, and Yield.

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Median Width

The median width is a critical factor in defining how a divided highway intersection or crossover operates. As such, it has an important impact on the signs used. Medians are classified as wide or narrow. In a wide median, the opposing left-turn paths cross each other. In a narrow median, the opposing left turns do not cross. Figure 7-1 illustrates this difference.

Difference in Operations between a Wide and Narrow Median (click in image to see full-size image)

Figure 7-1. Difference in Operations between a Wide and Narrow Median

The median width is measured between the inside of the left turn lanes, or if there is no left turn lane on an approach, from the inside through lane. The types of medians are defined below. Figure 7-2 illustrates how to measure median width.

  • Wide Median: the distance between left turn lanes (or through lane if there is no left turn lane) is 30 ft or more.
  • Narrow Median: the distance between left turn lanes (or through lane if there is no left turn lane) is less than 30 ft.

Measuring Median Width (click in image to see full-size image)

Figure 7-2. Measuring Median Width

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Markings for Divided Highway Intersections and Crossovers

Stop lines, Yield lines, and centerlines are not used within the median area of narrow medians.

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Delineation for Divided Highway Intersections and Crossovers

Chapter 7 provides guidance on delineating divided highway intersections and crossovers.

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Divided Highway Intersections

Divided highway intersections are ones where there is an external leg intersecting with one or both of the through roadways. For the illustrations in this section, the vehicle approaching the divided highway has the option of turning left or right (in other words, there is a median opening).

This section presents the following divided highway illustrations:

  • Figure 7-3: Wide median with left turn bays and an external state road on one side.
  • Figure 7-4: Wide median with left turn bays and an external state road on both sides.
  • Figure 7-5: Wide median with no left turn bays and an external state road on one side.
  • Figure 7-6: Narrow median with left turn bays and an external state road on one side.
  • Figure 7-7: Narrow median with left turn bays and an external state road on both sides.
  • Figure 7-8: Narrow median with no left turn bays and an external state road on one side.
  • Figure 7-9: Wide median with no left turn bays and an external local road on one side.

Signing for Wide Median Divided Highway Intersection with
Left Turn Bay and One External Road (click in image to see full-size image)

Figure 7-3. Signing for Wide Median Divided Highway Intersection with Left Turn Bay and One External Road

Signing for Wide Median Divided Highway Intersection with
Left Turn Bay and Two External Roads (click in image to see full-size image)

Figure 7-4. Signing for Wide Median Divided Highway Intersection with Left Turn Bay and Two External Roads

Signing for Wide Median Divided Highway Intersection without
Turn Bay and One External Road (click in image to see full-size image)

Figure 7-5. Signing for Wide Median Divided Highway Intersection without Turn Bay and One External Road

Signing for Narrow Median Divided Highway Intersection
with Left Turn Bay and One External Road (click in image to see full-size image)

Figure 7-6. Signing for Narrow Median Divided Highway Intersection with Left Turn Bay and One External Road

Signing for Narrow Median Divided Highway Intersection
with Left Turn Bay and Two External Roads (click in image to see full-size image)

Figure 7-7. Signing for Narrow Median Divided Highway Intersection with Left Turn Bay and Two External Roads

Signing for Narrow Median Divided Highway Intersection
without Turn Bay and One External Road (click in image to see full-size image)

Figure 7-8. Signing for Narrow Median Divided Highway Intersection without Turn Bay and One External Road

Signing for Wide Median Divided Highway Intersection with
Local Road (click in image to see full-size image)

Figure 7-9. Signing for Wide Median Divided Highway Intersection with Local Road

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Crossovers

Crossovers provide road users with an opportunity to change directions on a divided highway. There are no external roads at a crossover. This section presents the following crossover illustrations:

  • Figure 7-10: Wide median crossover with left turn bays.
  • Figure 7-11: Wide median crossover with no left turn bays.
  • Figure 7-12: Narrow median crossover with left turn bays.
  • Figure 7-13: Narrow median crossover with no left turn bays.

Signing for Wide Median Crossover with Left Turn Bay (click in image to see full-size image)

Figure 7-10. Signing for Wide Median Crossover with Left Turn Bay

Signing for Wide Median Crossover without Turn Bay (click in image to see full-size image)

Figure 7-11. Signing for Wide Median Crossover without Turn Bay

Signing for Narrow Median Crossover with Left Turn Bay (click in image to see full-size image)

Figure 7-12. Signing for Narrow Median Crossover with Left Turn Bay

 Signing for Narrow Median Crossover without Turn Bay (click in image to see full-size image)

Figure 7-13. Signing for Narrow Median Crossover without Turn Bay

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