This paper entitled "Influence of Vehicular Traffic on Noise emissiori levels in the City of Juanjuí - San Martín 2011." It was developed in the city of Juanjuí, aiming determines the influence of vehicular traffic on noise emission levels in the city of Juanjuí- San Martín 2011. The research is descriptive sample was taken as eight monitoring points, located at strategic points in the city, selected at random in the main points of concentration and times 6:30 to 7:30 a.m., 12:00 - 1:00 pm, 5:30 to 6:30 pm. Reached the following conclusions: There has been calculating the amount of vehicles on the main streets of the city of Juanjuí, finding that the number of vehicles per hour in larger quantities, is presented in Tatters, Jr. Arica Intersection with Huallaga, (31 0.8 motor units), Jr. intersection point with the Triunfo (324.71 motorized units) and the intersection with La Merced...