SmartDb an object-oriented simulation framework for intelligent vehicles and highway system.pdf

SmartDb: An Object-Oriented Simulation Framework forIntelligent Vehicles and Highway Systems Aleks Gollu, Akash Deshpande, Praveen Hingorani, and Pravin VaraiyaDepartment of Electrical Engineering and Computer SciencesUniversity of California, Berkeley, CA 94720AbstractSmartDB is a framework for the uniform spec-ication, simulation, optimization, evaluation, andimplementation of Intelligent Vehicle Highway Sys-tem (IVHS) alternatives. The salient concepts inSmartDB are: 1) layered control architecture, 2) co-ordination of distributed control agents through com-munication, 3) combined discrete and continuous dy-namical systems, known as hybrid systems, and theircontrol and verication, 4) object oriented simulation,and 5) distributed and open architecture. This pa-per summarizes the rst three concepts and describesin detail the simulation constructs and the distributedand open architecture of SmartDB.1 IntroductionHighway congestion is imposing an intolerable bur-den on many urban residents. It is estimated that lostproductivity due to trac congestion costs $100 bil-lion each year in the United States. Alongside conges-tion, safety continues to be a prime concern. In 1991,41,000 persons died in trac accidents, and more than5 million persons were injured.Research supported in part by the National Science Foun-dation and the California PATH program in cooperation withthe State of California and US DOT. The contents of this re-port re ects the views of the authors who are responsible forthe facts and accuracy of the data presented hereinISBN 0-8186-6440-1. Copyright c 1994 IEEE. Allrights reserved.Personal use of this material is permitted. How-ever, permission to reprint/republish this material foradvertising or promotional purposes or for creatingnew collective works for resale or redistribution mustbe obtained from the IEEE. For information on ob-taining permission, send a blank email message toinfo.pub.permission@.By choosing to view this document, you agree