Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The durability of markings on concrete pavement has always been a problem. Recently, recesses have been ground into the pavement to allow the markings to sit below the surface of the concrete in hopes that this would reduce the wear on the marking material. However, this method is time-consuming and expensive. In 1999 2000 on project NH 0342-034, Castle Rock Construction modified the screed bar on a paver to form grooves for both shoulder stripes and the skip stripe on a 4-lane divided highway US 34 east of Kersey from about mp 122 to 124 both east and westbound. The contractor welded pieces of 1/4 inch-thick steel to the bottom of the paver screed to form the grooves as the concrete was placed. The grooves for the shoulder stripes are 4.5 inches wide; the groove for the skip stripe is 8 inches wide. This study evaluated the condition of the thermoplastic and pavement marking tape stripes through several winters to see if the grooves provided significant protection for the stripes. Placing lane markings in shallow grooves in the pavement results in considerably longer marking life, making the highway safer for drivers. Retroreflectance measurements showed that stripes recessed below the surface of the pavement in grooves remained useful over the full three-year evaluation period. Forming grooves in plastic concrete as the pavement was placed was essentially cost-free as it required only minimal changes to the paving equipment.
The durability of markings on concrete pavement has always been a problem. Recently, recesses have been ground into the pavement to allow the markings to sit below the surface of the concrete in hopes that this would reduce the wear on the marking material. However, this method is time-consuming and expensive. In 1999 2000 on project NH 0342-034, Castle Rock Construction modified the screed bar on a paver to form grooves for both shoulder stripes and the skip stripe on a 4-lane divided highway US 34 east of Kersey from about mp 122 to 124 both east and westbound. The contractor welded pieces of 1/4 inch-thick steel to the bottom of the paver screed to form the grooves as the concrete was placed. The grooves for the shoulder stripes are 4.5 inches wide; the groove for the skip stripe is 8 inches wide. This study evaluated the condition of the thermoplastic and pavement marking tape stripes through several winters to see if the grooves provided significant protection for the stripes. Placing lane markings in shallow grooves in the pavement results in considerably longer marking life, making the highway safer for drivers. Retroreflectance measurements showed that stripes recessed below the surface of the pavement in grooves remained useful over the full three-year evaluation period. Forming grooves in plastic concrete as the pavement was placed was essentially cost-free as it required only minimal changes to the paving equipment.
Recessed Striping in Concrete Pavement
W. Outcalt (Autor:in)
2004
20 pages
Report
Keine Angabe
Englisch
Highway Engineering , Transportation , Transportation & Traffic Planning , Pavement markings , Concrete pavements , Pavement grooves , Paving equipment , Durability , Lane markings , Paving , Service life , Traffic control devices , Grooving , Retroreflection , Road materials , Recessed striping , Pavement marking tape
PRODUCT PROFILE: New recessed striping machine
Online Contents | 1997
Engineering Index Backfile | 1947