Congestion Maps and Highlight Aerial Photography

Congestion Maps & Photos
There are two types of congestion maps: Bottleneck maps present the findings of the surveys; composite maps for the 2004/2005 surveys and the 2007/2008 surveys are included on this site. Congestion is depicted with red and orange arrows, which are linked to associated highlight aerial photographs. Comparative maps are virtually identical, except that red and orange arrows only show where significant degradation has occurred between surveys. Where congestion levels have not changed significantly, black and gray shades are substituted for red and orange colors. Where conditions have improved significantly, green arrows or orange arrows bordered with green are used. (Click on the "Map Legends " tab for more information.)
Map Legends
This tab opens a separate window that displays symbols used to depict bottlenecks on both map types.

Navigating the maps

Map Selection: Use the drop-down box in the upper left corner of the MapViewer to select Morning or Evening maps.
Navigation Tools: Navigation tools are located at the top right corner of the MapViewer and include a Zoom-In, Zoom-Out and Pan buttons. Select one of the tools, and then click on the map to zoom in or out, or click and drag to pan the map. Additional zoom options are available by right-clicking on the map.
Photo Selection: To view photos, mouse over any of the colored arrows or the helicopter icons and click when the icon changes to the selection hand. The photos will open in a separate window. To return to the map, close the photo window.
Not all arrows are interactive. If a mouse-over does not reveal a "hand-select" icon, photos are not provided for that site.

These maps contain scripts and large files which may take some time to load; a broadband connection is recommended.
This tool requires that the free Adobe Flash Player be installed on your computer. This is a common plug-in that comes installed on many computers, but if the congestion map does not appear, you will need to download and install the player. Click here to download the Adobe Flash Player.
If you are prompted by a pop-up named "Adobe Flash Player Security":
1. Click on the Settings button.
2. A web browser window will open taking you to a web page for the Flash Player Security Settings.
3. In the window on the right of the page, click the 'always allow' button.
4. Close all open web browser pages (including this presentation).
5. Open your web browser and return to this page.