Through Bottlenecks, you can view the analysis and the ranking the worst congested locations at the statewide or at a MPO level.
Step 1: Accessing and Overviewing Bottlenecks
Image 1: Access Bottlenecks via the Dashboard
Click on a "Analyze Bottlenecks" button located on the dashboard for quick launch of bottlenecks page. Alternatively, you can access through Bottlenecks button from the main menu (small red arrow)
Image 2: Bottlenecks overview
By default, Table shows the names of worst congested road segment sorted by ranking of ATRI's Total Freight Congestion Values in a given month. There are 4 other congestion measures (chenea, phed, tttr, lottr) available as well and this will be discussed more in step 2. In the table, you can also find each bottlenecks' TMC id, value history/rank history graphs for the last 12 months, values of measures you choose. From menu on top (red box), you can choose different measures of congestions, geography level, year/month, road type, and vehicle type as well.
Image 3: Maps
On the right side of the page (red box), you can find a map with location marks of each bottlenecks in the table. Each location has weighted circle mark and will be highlighted in red if you put your mouse cursor over a bottleneck name in the table. You can navigate maps with zoom in/out and pan with your mouse and apply detail Satellite image background by clicking Satellite button.
Step 2: Bottlenecks Analysis
Image 1: Choose a congestion measure.
From the first drop down menu (red arrow), you can apply 5 different congestion analysis algorithms; ATRI's Total Freight Congestion Values (Click here to see more detail), Chen at al. algorithms (Click here to see more detail), PHED (Peak Hour Excessive Delay), TTTR (Truck Travel Time Reliability), LOTTR (Level of Travel Time Reliability)
Image 2: More date parameter
From other drop-down menu, you can also apply different geography level (State-wide or a MPO), year and a month, road type (All Roads or Interstate only), and Vehicle type (total, single, combined, passenger, and truck)
Image 3: Graphs by each 5 min epoch
If you double click each bottleneck name, it will open up a graph window with values of each measures and AADT (if available) in 5 min epoch, showing value trend for the full 24 hours. You can also adjust starting and ending epoch by adjusting slide bar (red arrow) at the bottom of each graph. Vehicle type buttons (red box) are also available here to be applied immediately on graphs. Once done, you can close graph window by clicking x mark on top right of graph window.