1 / 17

KENT COUNTY Safety Edge Projects

KENT COUNTY Safety Edge Projects. Lessons Learned. Vehicle leaves roadway on to the right shoulder, then over corrects, crosses centerline sticking oncoming vehicle head on. Shoulder condition?. Maintenance Issues. Low Shoulders require maintenance dollars

cuyler
Download Presentation

KENT COUNTY Safety Edge Projects

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. KENT COUNTY Safety Edge Projects Lessons Learned

  2. Vehicle leaves roadway on to the right shoulder, then over corrects, crosses centerline sticking oncoming vehicle head on.

  3. Shoulder condition?

  4. Maintenance Issues • Low Shoulders require maintenance dollars • Kent County’s shoulder repair costs for 2011 where $450,000. • Over $160,000 in new gravel. • Equipment and Labor • Involves constantly working in traffic

  5. Pavement & Shoulder Maintenance • Damage to outside edge of pavement • 7 shoulder repair units

  6. 3 Different Projects • Bailey Drive –between Vergennes St and Boynton Avenue (2.65 Miles) • Ada Drive –between Fox Hollow Dr and Thornapple River Dr (1.31 Miles) • 18 Mile Road– Casnovia to Peach Ridge Ave (1.5 Miles)

  7. Selection Criteria • Bailey – Narrow shoulder and horizontal curves • Ada Dr. – Narrow shoulder for higher volume • 18 Mile – Narrow shoulder

  8. Safety Edge

  9. 30 to 40 degree

  10. Three methods • Crush and shape and 2 Course Resurface • Placed Safety Edge on both courses • Single Course overlay • Trenched existing shoulders to place safety edge • Crush & Shape and 2 Course Resurface • Placed Safety Edge during Top Course

  11. Items to Consider • Cost to Place (including trenching) • Asphalt Valley Gutter Areas • Gravel loss at edge (incline) • Trapping Water on Shoulder • Compaction

  12. COST Additional HMA 30 Additional Tons per Mile/Side (3.5 inch Depth) 1 Mile Both Sides @ $55/ton = $3,300 Trenching Existing Shoulder Estimated Cost = $1,000 per mile

  13. Gravel loss one year later ½ to 1.5”

  14. TRAPPING WATER

  15. COMPACTION

  16. ANTICIPATED BENEFITS • Accident Reduction • Less concern of Edge Drop • May reduce edge cracking • Reduced maintenance costs

More Related