Agriculture and Food in Middle East, 3 rd Egyptian-Syrian Conf. 2006, El-Minia Univ., Egypt. Vol. (3) No (2)  GIS evaluation for the effect of vehicles on the pollution of Fayoum soils, Egypt. *Mahmoud M. Shendi, E. A. Khater, and **M. H. Abdel Motaleb *Soils and Water Dept., Faculty of Agriculture, Fayoum University, Egypt. ** El Fayoum General Court. Corresponding Author: Mahmoud Mohamed Shendi, Soils and Water Dept., Faculty of Agriculture, Fayoum University, Egypt. Tel: +20 2 8350837, Mobile: 0105350018, Fax: +20 84 334964, E-mail: mmshendi@yahoo.com ABSTRACT The effect of automobile exhausts on soil pollution with Pb and Cd was tested in three sample areas in El Fayoum Governorate. The roads network were overlayed first over the soil-map of Sinnuris Districts to specify the soil mapping units that have roads with different construction ages and with different types of side trees wind barriers. The tested soils are classified mainly as Typic Haplotorrerts. Three sample areas were taken surrounding 3 roads, each of them has 3 sampling tracks with 100 m apart. Mini-pits were sampled in each track at distances of 10 , 20 ,50 ,100 and 200 m east of the roadside. All soil samples were tested for total and available Pb and Cd. Interpolation was done to create sample areas maps using ILWIS GIS. The study indicated that effect of automobile exhausts on soil pollution with Pb and Cd is recognizable. Correlation models were calculated to represent the relationship between the total Pb and Cd contents and distance from the tested roads. Key Words: GIS, Environmental impacts, automobile exhausts , pollution, Fayoum soils. 1. INTRODUCTION Urban air pollution is a major environmental problem which jeopardizes Egypt's economic development and its citizens health. Urban air quality is seriously degraded as a result of industrial emissions, vehicles, constructions, garbage burning, and natural dust from surrounding deserts. The vehicles emissions constitute one of the major soil pollution source, especially along highways and different roads. The roads traffic density is considered a major factor for soil pollution usually along roads. The emitted pollutant particles travel on the air for a specific distance, then precipitate on soil and plant surface. The present study aimed mainly to investigate the effect of automobile exhausts on soil pollution with Pb and Cd around some selected highway roads at Sinnuris District, Fayoum . 1.1 Research objectives The work aimed to achieve the following objectives; a) To test the effect of automobile exhausts on soil pollution beside El-Fayoum highway roads.