MAG is tracking the amount of time commuters are stuck in traffic on a daily basis. The measure of congestion delay is calculated from speed data, which covers all major freeways and most of the arterial streets in Maricopa County. Safe and Smart Travel, Transportation Transportation, Traffic, Trend Updated: May 1, 2024 The Maricopa Association of Governments is tracking the amount of time commuters are stuck in traffic on a daily basis. The measure of congestion delay* is calculated from speed data, which covers all major freeways and most of the arterial streets in Maricopa County on a daily basis, 24 hours a day. Please note that the graphs below are derived from INRIX data, which are proprietary and require attribution. A single notation within a report that contains INRIX data and a single logo on web pages that draw from INRIX data is acceptable. For example, a reporter could say "according to travel time data by the analytics company INRIX." The graphs below incorporate the appropriate attributions. Subscribe for updates when data changes Get email updates! Learn more *The delay (measured in vehicle hours) is calculated as the excessive travel time for all vehicles when average speed during a given hour is at least 20mph lower than the free-flow speed. The daily delay is calculated as the sum of hourly delay per day in the region. Fewer Cars Equals Less Congestion Comparing 2020-2024 What does this chart show? Fewer cars means less congestion, which means high average speeds. Speeds on freeways did not change noticeably from the 3rd week of March to the end of August in 2020, and then began to decrease due to the increase of congestion. Data for this chart are updated quarterly. Maricopa County Traffic Congestion Delay Through April 2024 What does this chart show? Less traffic congestion means faster travel times; faster travel times mean less delay when compared to free flow traffic. MAG monitors speed data for all major freeways and highways in Maricopa County 24/7. Congestion delay compares actual travel times, such as rush hour travel, to travel times when traffic is free flowing. Since falling in mid-March 2020, congestion delays remained relatively low and stable through the fourth week of August 2020. Congestion delays started to gradually increase beginning in September 2020, while still remaining lower than pre-pandemic conditions. By end of March 2023, we were back to pre-pandemic congestion delay. Read more about how traffic has changed during COVID-19 here Average Weekday Traffic Volume Now vs. Normal Through March 2024 What does this chart show? Average Weekday Daily Traffic Volume for the week of March 2, 2020, is considered "normal" traffic conditions, defined as 100%. The lowest number of vehicles on the regional roads is observed during the 2nd week of April 2020, as 63% to traffic volumes under normal conditions. Since hitting its lowest volumes of 63% of normal in the second week of April 2020, the number of vehicles on regional roads increased to 87% of normal traffic volumes during the third week of June. Volumes decreased to below 80% during July 2020, and gradually recovered to normal conditions after March 2021. NOTE: The data are primarily for the freeways and arterials in Maricopa County. Average Heavy Truck Traffic Through the first quarter in 2024 What does this chart show? The week of March 2, 2020, is considered "normal" traffic conditions, defined as 100%. After heavy truck volumes showed a comparatively modest drop to the 91% of normal volumes during the 2nd week of April in 2020, heavy truck volumes have maintained at or above 100% since May of 2020. NOTE: The data are primarily for the freeways and state highways in Maricopa County. Active Transportation Trips2020 vs. 2021/2022/2023/2024 What does this chart show? Active transportation trips (biking, walking and running) have increased significantly since March 2020. Updated May 1, 2024 Published August 31, 2020