Burch, D. (2004). Estimating excavation, Craftsman Book Com-pany, Carlsbad, C.A.Burch, D. (2004). Estimating excavation, Craftsman Book Com-pany, Carlsbad, C.A.

Fromm, H. J. and Corkill, J. T. (1971). An evaluation of surface course mixes designed to resist studded tire wear, Research and Trans-portation Systems Branch, Ontario Department of Highways.Fromm, H. J. and Corkill, J. T. (1971). An evaluation of surface course mixes designed to resist studded tire wear, Research and Trans-portation Systems Branch, Ontario Department of Highways.

Greek, E. R. (1975). Alaska garnet tire study, Alaska Department of Highways.Greek, E. R. (1975). Alaska garnet tire study, Alaska Department of Highways.

Hayhoe, G. F. and Kopac, P. A. (1982). Evaluation of winter-driving traction aids, NCHRP Research Results Digest 133, National Research Council, Transportation Research Board. Hayhoe, G. F. and Kopac, P. A. (1982). Evaluation of winter-driving traction aids, NCHRP Research Results Digest 133, National Research Council, Transportation Research Board.

Lu, J. J., Junge, D. C. and Esch, D. C. (1994). Winter tire traction evaluations, Transportation Research Center, University of Alaska, Fairbanks.Lu, J. J., Junge, D. C. and Esch, D. C. (1994). Winter tire traction evaluations, Transportation Research Center, University of Alaska, Fairbanks.

10.3141/1731-06Raad, L. and Lu, J. (2000). “Traction performance of transit and para-transit vehicles in winter.” Transportation Research Record: Journal of the Transportation Research Board 1731, pp. 40-50.Raad, L. and Lu, J. (2000). “Traction performance of transit and para-transit vehicles in winter.” Transportation Research Record: Journal of the Transportation Research Board 1731, pp. 40-50.

Raad, L. and Lu, J. J. (1998). Traction performance of transit and para-transit vehicles during winter season, Transportation Northwest Regional Center X, Seattle, WA.Raad, L. and Lu, J. J. (1998). Traction performance of transit and para-transit vehicles during winter season, Transportation Northwest Regional Center X, Seattle, WA.

Rosenthal, P., Haselton, F. R., Bird, K. D. and Joseph, P. J. (1969). Evaluation of studded tires: Performance data and pavement wear measurement, Highway Research Board, National Research Council.Rosenthal, P., Haselton, F. R., Bird, K. D. and Joseph, P. J. (1969). Evaluation of studded tires: Performance data and pavement wear measurement, Highway Research Board, National Research Council.

Scheibe, R. R. (2002). An overview of studded and studless tire traction and safety, WA-RD 551.1. Washington State Trans-portation Center.Scheibe, R. R. (2002). An overview of studded and studless tire traction and safety, WA-RD 551.1. Washington State Trans-portation Center.

Smith, P. and Schonfeld, R. (1970). Studies of studded-tire damage and performance in ontario: Winter 1969-1970, DHO Report No. RR165, Ontario Ministry of Transportation.Smith, P. and Schonfeld, R. (1970). Studies of studded-tire damage and performance in ontario: Winter 1969-1970, DHO Report No. RR165, Ontario Ministry of Transportation.

Smith, R. W., Ewens, W. E. and Clough, D. J. (1971). “Effectiveness of studded tires.” Highway Research Record 352, pp. 39-49.Smith, R. W., Ewens, W. E. and Clough, D. J. (1971). “Effectiveness of studded tires.” Highway Research Record 352, pp. 39-49.

Sokolovskij, E. (2007). “Automobile braking and traction charac-teristics on the different road surfaces.” Transport, Vol. 22, No. 4, pp. 275-278.Sokolovskij, E. (2007). “Automobile braking and traction charac-teristics on the different road surfaces.” Transport, Vol. 22, No. 4, pp. 275-278.