Design and evaluation of modified centerline rumble strips : final report.

Details

• Creators:
  Kim, Yong-Rak ; You, Taesun ; Rilett, Laurence R.
• Corporate Creators:
  University of Nebraska--Lincoln. Dept. of Civil Engineering ; Nebraska Transportation Center ; United States. Federal Highway Administration
• Corporate Contributors:
  Nebraska. Dept. of Roads
• Subject/TRT Terms:
  • Highway design
  • Pavement distress
  • Rumble strips
  • Center lines
  • Road markings
  • Highway safety
  • Two lane highways Centerline rumble strip design
  • pavement
  • finite element simulation
  • damage prediction
• Publication/ Report Number:
  26-1121-4026-001
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska;United States
• Corporate Publisher:
  Nebraska. Dept. of Roads
• Abstract:
  A centerline rumble strip (CLRS) is primarily installed on the centerline of undivided two-lane and two-way roadways ; to alert drivers that they are moving out of their intended travel lane. The main purpose of CLRSs is to reduce crossover ; collisions typically caused by inattentive, distracted, drowsy, or fatigued drivers. Despite the safety benefits, ; CLRSs that were milled over or adjacent to the centerline joint may increase or accelerate the deterioration and ; degradation of the pavement structure, which has been observed in Nebraska pavements. In this research project, new ; (or modified) CLRS designs were sought to reduce pavement damage, while satisfying the safety purpose of CLRSs. ; A literature review including a survey of the CLRS design practices in different states and discussions with the project ; technical advisory committee (TAC) members resulted in three proposed modified CLRS designs. Then, the current ; (8”-4”-8” with 0.5” depth) and modified designs (6”-6”-6” with 0.5” depth, 5”-7”-5” with 0.375” depth, and 6”-8”-6” ; with 0.5” depth) were evaluated using finite element pavement modeling and simulations to assess the stress and ; damage potential of pavements associated with the different CLRS designs. Two primary types of pavements in ; Nebraska (i.e., composite pavements and concrete pavements) were considered. Model simulation results demonstrated ; that pavements with CLRSs showed higher stress than pavements without CLRSs. In addition, each CLRS design ; induced different stress distributions (and damage potential) due to different tire-pavement contact. The highest stress ; typically occurred at the corner/edge of the CLRS, and the current CLRS design (i.e., 8”-4”-8” with 0.5” depth) ; produced higher stress (or damage potential) than the modified designs in both types of pavements. A comparison of ; the three modified CLRS designs in this study showed that one modified design (6”-6”-6” with 0.5” depth) generally ; yielded the lowest stress. This research provides preliminary insights into how a modified CLRS design can reduce the ; pavement damage, while the findings should be validated through field testing in a follow-up effort.
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• Format:
  PDF
• Funding:
  SPR-P1(16) M034
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32114/dot_32114_DS1.pdf
• File Type:
  [PDF - 3.60 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:97e97f32630ef38922f86a3d0dddea10ede33fb1d4da1fd1dfef9ca7741952feb6fb5d461f6adde63b28e9f0ef260dfa3c43ad263314f29e2b782298ea3eee73