SUPERPAVE Digest 453
Topics covered in this issue include:
4) FRICTION PROBLEMS ON PAVEMENT MARKINGS
by <>
- To: "SUPERPAVE DISCUSSION GROUP" <
- Subject: FRICTION PROBLEMS ON PAVEMENT MARKINGS
- From: <
- Date: Thu, 22 Mar 2001 17:39:03 +0200
DEAR COLLEAGUES,
I know that my question would be somewhat strange however I hope someone may offer some help on my question. I am looking for information on the possible connection between skidding accidents and pavement markings. In our special climatic conditions (about 8 long hot dry months without rains "cleaning" the pavement) there seems to be a problem especially on pedestrian crossings marks which, in our case are not sprayed by glass beads which may mitigate the problem. Do you have any information on this issue? Do you know any highway agency which, as a maintenance policy cleans the intersectionsarea especially the markings during the dry hot season and/or before the first rain is expected?
Thanks for your help.
Shimon Nesichi, M.Sc.,
Managing Director
Materials & Research Division,
Public Works Department,
Ministry of Transport,
Israel
SUPERPAVE Digest 457
Topics covered in this issue include:
1) RE: FRICTION PROBLEMS ON PAVEMENT MARKINGS
by Richard Cary <>
- To: "''" <
- Subject: RE: FRICTION PROBLEMS ON PAVEMENT MARKINGS
- From: Richard Cary <
- Date: Thu, 5 Apr 2001 08:07:58 -0400
The Port Authority of New York and New Jersey has cleaned tunnels and toll areas in the past. Due to the environmental concerns (washing oils and soaps down the storm drains into a river) this practice has stopped or been performed less often, I believe.
The New Jersey Turnpike has the same problem with toll areas. They were also washing toll areas.
The problem with the Turnpike and Port Authority is not the climate but the volume of vehicles going through their facilities.
Concerning your comment about the glass beads, I'm not sure adding beads to the cross-walk area would help a great deal. Glass beadsmay act as bearings rather than give asubstantial increase in the friction numbers.
How are your cross walks made? Is a large area painted or are they similar to ours (two lines painted across the roadway)? If it is a "large" area painted then you may want to look into using a different material for the crosswalks such as colored concrete, cobble stones, asphalt etc.
Good Luck,
Richard J. Cary