Abstract: A vehicle platform and a mini-instrument were used to monitor black carbon on roads in the main urban area of Jinan for a month to better understand the spatiotemporal patterns of black carbon and the impact of factors such as motor vehicle emissions on black carbon. The results showed that: (1) The hourly mean concentration of black carbon was 7.29 μg/m³, and the diurnal variation of black carbon showed two peaks, which appeared at 04:00-08:00 and 18:00-22:00 during rush and traffic jam hours. (2) The percentage of black carbon from fossil fuel combustion and biomass combustion was 82.55% and 17.45%, respectively. (3) The black carbon emission on roads was main roads (7.27 μg/m³) > secondary roads (6.56 μg/m³). The average concentration of black carbon on the North Park Elevated (7.18 μg/m³), where the proportion of diesel vehicles was higher, was higher than the concentration of black carbon on the Jingshi Road (5.64 μg/m³), where the proportion of gasoline vehicles was larger. (4) Black carbon peaks mostly occurred in the early morning and late night near intersections, and the highest concentration of black carbon was observed at 5 to 10 meters from the intersection, indicating that the black carbon concentration was influenced not only by traffic flow, but also by road conditions, vehicle types, vehicle speed and weather conditions. The study showed that the spatial and temporal distribution characteristics of road environmental black carbon pollution in Jinan were mainly influenced by the travel time and driving sections of heavy-duty diesel vehicles.