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> -----Original Message----- > From: Muriel Strand [mailto:[log in to unmask]] > Sent: 03 June 2003 23:54 > To: [log in to unmask] > Subject: pavement durability question > > > folks, > > it's my understanding that there's a range of price/durability options > when specifying what kind/grade of asphalt or other covering will be In the UK there are several design perameters to consider when selecting a surface course material The aggregate used is selected based on the traffic levels and also the location of the road in terms of the severity of the manouevres carried out on it Regarding the form of the material whether impervious macadam, stone mastic asphalt etc etc you would need to talk to a highway engineer familiar with those materials suitable for the local climate and what you prodice locally may be a cheaper option than brought in.... I guess you are in the air resources board? call me psychic but maybe... http://www.dot.ca.gov/hq/oppd/hdm/hdmtoc.htm Chapter 600 Design of the Pavement Structural Section chp0600.pdf 07-01-95 http://www.dot.ca.gov/hq/oppd/hdm/pdf/chp0600.pdf might help? John > used to construct or repave a road. > > any pointers to more detailed info (especially url's) would > be *greatly* > appreciated. > > thanks, muriel > > --