AKSUM UNIVERSITY COLLEGE OF ENGINEERING AND TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING A FINAL YEAR PROJECT SUBMITTED TO THE DEPARTMENT OF MECHANICAL ENGINEERING OF AXUM UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE BACHELOR’S OF SCIENCE IN MECHANICAL ENGINEERING MEASUREMENT AND ANALYSIS OF THREE WHEELER VEHICLE EMISSION BY: BIRUK BERIHUN ID NO. 1014/06 ADVISOR: MENGESHA WUDU CO. ADVISOR: UMMAL SALMAAN.N MARCH 2018 AXUM, ETHIOPIA