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Hsip horizontal alignment signing. Jason J. Siwula, PE – Safety Engineer. Horizontal Alignment Signing Initiative. Systemic Approach to installing Horizontal Alignment Signage (HAS)

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Hsip horizontal alignment signing

Hsip horizontal alignment signing

Jason J. Siwula, PE – Safety Engineer


Horizontal alignment signing initiative
Horizontal Alignment Signing Initiative

  • Systemic Approach to installing Horizontal Alignment Signage (HAS)

  • Install HAS utilizing fluorescent yellow sheeting along the entire corridor where one RD Plan “enhanced” curve is located for consistency and uniformity

  • Target approximately 25% of the state maintained system over the five year implementation schedule



Why horizontal alignment signs
Why Horizontal Alignment Signs?

  • Reduction in Lane Departure crashes

  • 2009 MUTCD Signing Changes

  • 2009 MUTCD Compliance Date

  • Driver expectation

  • Benefit / Cost


Crash modification factors for fluorescent curve signs
Crash Modification Factors for Fluorescent Curve Signs

Source: http://cmfclearinghouse.org


Examples of signage updates
Examples of Signage Updates

Previously Existing Signing

2009 MUTCD Signing Update


Mutcd compliance date december 31 2019
MUTCD Compliance Date – December 31, 2019

Many of the 2009 MUTCD Compliance Dates have been revised or eliminated, however, the compliance date for Horizontal Alignment Signing remains in place.









Benefit cost ratio between 8 6 102 3
Benefit / Cost Ratio between 8.6-102.3

Bottom line – Many sites can be implemented with

a relatively low cost for a significant benefit!

*B/C Source: FHWA-HRT-09-045


A new approach
A New Approach

  • Contract with a consultant to supplement Traffic Engineering functions

    • Ball Bank Indications

    • Setting of advisory speeds

    • Approximate sign placement

    • Quantities for letting projects



Example signing layouts
Example Signing Layouts

Non-Enhanced Curves or Turns

Enhanced Curves or Turns


Current status
Current Status

  • Contracts with all consultants have been authorized 11/26/2012

  • Horizontal Alignment Signing / Ball Bank Training Class (1st scheduled for December 18, 2012)

  • “Boots on the ground” starting near the first of the year


Next steps
Next Steps

  • Review initial corridor submissions from each consultant

  • Meet with the Districts to discuss implementation through the Construction Procurement process (inspection, quality control, etc.)

  • Let construction contract(s) for several corridors to ensure the quality of the end product

  • Adjust the process as necessary for implementation and complete Phase 1 and Phase 2.