| Header | Body | Order | |
|---|---|---|---|
| <b>Why can’t I zoom in on a certain location?</b> | The project had funding for one zoom layer. Each zoom layer requires additional storage. | 1 | Edit | Details | Delete |
| <b>How do I record a video?</b> | 1. Select the start and end times using the calendar and clock icons.<br/><br/> 2. Select the load icon and wait until the data has been loaded. A green message will appear<br/><br/> 3. Select the far right icon in the “Animation Control” box that looks like a target.<br/><br/> 4. Wait for the entire animation to play through and then select the “Download video” icon.<br/><br/> | 2 | Edit | Details | Delete |
| <b>Where does the video download to?</b> | The video download location is dependent on your computer settings. There have been instances reported where the video will appear to be downloading and then nothing happens. These instances have self-corrected prior to being able to effectively troubleshoot the issue. | 3 | Edit | Details | Delete |
| <b>Why do I only see green links when I know there was congestion?</b> | This may have occurred from changing the date/time and not loading the data again. The “load” button needs to be selected whenever the time period is modified. It is helpful to refresh the screen and load the data again if the previous reason did not pertain to your problem. If it is close to daylight savings, then a configuration change might be needed. | 4 | Edit | Details | Delete |
| <b>What do gray links mean?</b> | A gray link means that this segment of freeway was not receiving any speed data during that time period. | 5 | Edit | Details | Delete |
| <b>Can I stop a recording in the middle and download the video?</b> | No, this feature has not been added. You can change the time period to match the desired duration to the nearest hour. Videos can be trimmed using software outside this tool. | 6 | Edit | Details | Delete |
| <b>How do I load the video into PowerPoint?</b> | The video will need to be converted to file type compatible to PowerPoint. There are online converter tools for .avi to .wmv files. | 7 | Edit | Details | Delete |
| <b>Why do I get an error message “No Data Found” or only show green links when there was congestion?</b> | A time period was selected outside the data storage available for this graph. The data storage currently has back until May 2015. (Checked 5/25/16) | 8 | Edit | Details | Delete |
| <b>Why is my computer not allowing me to watch the video?</b> | Computer settings need to be updated to allow .avi media to be viewed with your program. | 10 | Edit | Details | Delete |
| <b>What do the terms fast reliable speeds, fast unreliable speeds, slow reliable speeds, and slow unreliable speeds mean?</b> | The freeway was broken into one mile segments. Each segment was categorized as fast or slow if the median speed for the time period was below 50 mph. This threshold speed was chosen because it is the approximate speed to optimize vehicle throughput. A segment was categorized as reliable or unreliable using the buffer time index (BTI) of 0.6. A value of 0.6 means a person will need to add 60% more time to their average travel time to arrive on time 95% of their driving experiences. The greater the BTI value, the more variance in a travel time from day-to-day and thus more unreliable. <br></br> <img src="../Images/reliability.png"alt="Reliability"align="middle"height="200"width="400"> <br></br> | 11 | Edit | Details | Delete |
| <b>What is a vehicle-hour?</b> | A vehicle-hour is an additional hour a vehicle had to wait in traffic. It represents lost time from congestion. If the occupancy rate of vehicles was always known then it could be converted to person-hours or an hour a person was delayed. | 12 | Edit | Details | Delete |
| <b>How is the source of congestion identified?</b> | Congestion is identified as any 5 minute interval under 50 mph at each mainline station. The source is determined by looking at internal weather, incident, construction, and traffic speed databases. If indicators for multiple sources are present then a hierarchy of congestion sources is used as shown in the figure below.<br></br> <img src="../Images/hierarchyofcongestionsources.png"alt="Hierarchy of congestion sources"align="middle"height="200"width="400"> <br></br> The result of using this approach means that topics near the top of the order exceed the actual amount in delay while those on the bottom are under. Incidents is only the source of congestion while the incident is active. So if an incident is cleared and a long queue still remains then this will be counted as capacity if no other factors are present. This can cause recording less delay than actual caused by incidents. | 13 | Edit | Details | Delete |
| <b>What does the 85% and 15% profiles mean?</b> | The 85% and 15% profiles refer to the number of vehicles whose speeds fall below the point indicated on the graph. So, for example, 100% would mean the maximum speeds observed.<br/><br/><img src='../Images/SpeedFaq.png' /> | 14 | Edit | Details | Delete |
| <b>What time periods are used for the AM and PM calculations on the Speed Report page?</b> | AM is 7 am to 8 am, PM is 5 pm to 6 pm. | 15 | Edit | Details | Delete |