The ATR and toll count data is collected on a continuous basis. Counters are placed for 48 hours on a Monday or Tuesday and are picked up that Thursday or Friday, respectively. Growth factors are applied to counts which were not taken during the current year and the counts are factored based on the past yearly growth of an associated ATR. Program count data is collected in both directions (inventory & non-inventory) at regular locations on either a three (3) year or six (6) year cycle depending on the type of roadway. The quality control feature of the system allow data edit checks and validation for data from the 91 permanent, continuous automatic traffic recorders (ATRs) and short-term traffic counts. Ten (10) years of historic AADT & AAWDT traffic volume metrics are also availablefor each geographic location or segment of roadway throughout the State, where applicable.Annual Average Daily Traffic (AADT) data is collected from over 8700 program count stations and 84 ATRs, located throughout Maryland. Overall percent utilization, percent utilization based on vehicle class, and truck-specific percent utilization are showcased as statistical metrics for each geographic location or segment of roadway throughout the State, where applicable. Traffic volume metrics are produced from traffic count information used to calculate annual average daily traffic (AADT), annual average weekday traffic (AAWDT), AADT based on vehicle class (currentyear only) for roadways throughoutthe State. summarizes equivalent annual costs for both CCS and ITS MVDS.Esri ArcGIS Online (AGOL) Hosted Feature Layer for accessing the MDOT SHA Annual Average Daily Traffic (AADT) data product.MDOT SHA Annual Average Daily Traffic (AADT) data consists of linear & point geometric features which represent the geographic locations & segments of roadway throughout the State of Maryland that include traffic volume metrics. Summary of ITS-MVDS Construction and O&M Costs. Summary of CCS Construction and O&M costs. O&M costs include maintenance contract, TOC contract, utility, and MDOT staff costs.
ITS-MVDS costs were obtained from the MDOT’s previous research report, “Costs and Benefits of MDOT ITS Deployments.” Construction costs include the design contract, construction contract, and system manager contract costs. The following tables summarize the construction costs and the operation & maintenance (O&M) costs for a CCS system on a 4-lane divided highway as well as an ITS-MVDS. Data from 614 ITS-MVDS sites, 54 WIM sensors, and 126 CCS stations was obtained from 2012 to 2016 the study occurred from Apto April 30, 2018. The project also analyzed site appropriateness and developed recommendations for where sites should be relocated to enhance traffic information, reduce data redundancy, and expand data sampling. Accuracy was compared against the volume, speed, and vehicle classification data collected from Michigan Department of Transportation’s (MDOT) Continuous Count Station (CCS). This project evaluated the accuracy of traffic volume data collected by Intelligent Transportation Systems-Microwave Vehicle Detection System (ITS-MVDS) sites geographically distributed throughout Michigan.
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