Urban applications around here (Southern California) tend toward slurry seal to extend the life of the roadway between pavings. I have, however, even seen Cal-Trans chip seal, but the only time was down on I-8 between El Centro and Yuma. Chip seals, with a topping fog seal, are quite common in the agricultural areas, particularly in the Central Valley, but on the secondary roads. "Crack seal" is popular at all levels of highway/road maintenance. (I was drawn into this discussion by the subject header; I'm a professional in the petroleum-products transportation industry.)