Help

The following pages have help content: Home, Road Conditions, Speeds, Road Work, and Devices



Home Page Help
 
Preset zooms for road conditions map and traffic

Pre-defined zooms of the map of Colorado with either Road Conditions or Speed and Travel Time information. Click on a link to see the map and content.
Camera tours

Lists a few still cameras such as an I-70 tour. All the cameras (still and streaming) can be seen on any of the map pages (such as Road Conditions, Speeds, etc).
Severe travel alerts on home page

High traffic impact alerts that are currently active are listed here. The types of alerts include: Road Closures, Restrictions, Seasonal Closures, Partial Lane Closures and Road Work (Construction).

Road Conditions Help
 
Road conditions map


Provides a graphical color view of the road conditions for the major roads in Colorado. The road conditions include: Blowing Snow, Icy, Icy Spots, Snow Packed, Snow Packed Icy Spots, Snow, Slushy, Wet, Rain, Scattered Showers, Poor Visibility, High Wind and Dry. A road can have more than 1 condition, however, the color is determined by the most severe condition.

The map also lists any high traffic impact severe travel alerts as icons. All cameras are displayed as well. Click on an icon to view the current image, live streaming video content or more information about the alert.

Please keep in mind that these road conditions can and do change rapidly; they are the latest reported from the field and the actual road conditions may vary.

Road conditons map help


Navigate the map using:

  • Double click to zoom in
  • Use the magnifying glass tool to select pre-set zooms (such as Colorado, Denver, etc.)
  • Left click your mouse and drag to pan
  • Use the +/- buttons to zoom in and out
  • Click or drag the slider to change the zoom
  • Map overview tool (left bottom corner)

The zoom levels supported are from level 8 to 13 for the map

Road conditions table


The Hazardous (Active) Driving conditions tab shows road ways whose conditions are: Blowing Snow, Snow, Icy, Slushy, Poor Visibility, High Wind, Icy Spots OR there are comments in the road condition that include: Severe, Danger, Hazard, Tornado, Damage, Extreme, Restriction, Chain, or Closed. The All Roads tab lists the road conditions for all roads that CDOT currently reports on.
Click on a particular road segment row in this table, and it will pan to that area on the map and display a balloon window with additional content (see balloon window below in this section).

The Travel Alerts tab lists all current Road Closures, Restrictions, Seasonal Closures, Partial Lane Closures and Road work. Click on a particular alert to see the location and more information about it.

The PDF icon at the bottom of this table provides a printable view of these Road Conditions

The Road conditions are typically updated 4 times a day in winter and once a day in the summer. During severe weather the conditions are updated more often. Click the Refresh refresh button button (top right next to date in this table) to get the latest content

Road conditions legend

Legend describing the text value and corresponding color of the various road conditions reported.
Travel alert balloon

Balloon window showing an example Chain Law in place and when it was last updated.

Speeds Help
 
Speed map


Current expected travel times and speeds on the highway system between Denver and Vail, and some arterials in Denver are displayed using colors (black to green). The speeds are calculated every 2 minutes using current driving speeds on the roads. A complex algorithm uses toll tags by matching them at various locations as the primary data input, supplementing it with point speed data from inductive loops and side-fire radars to determine expected speed and travel times on various segments of the roads. CDOT has deployed several 100 devices to provide this data input.

To find out more about how we calculate the speed, do it securely and protecting your privacy click here.

The speeds on the road ways are used to determine the route travel times (such as from Denver to Vail) and then posted automatically to the Message Signs every 4 minutes.

The map also lists any high traffic impact severe travel alerts as icons. All cameras are displayed as well. Click on an icon to view the current image, live streaming video content or more information about the alert.

Please keep in mind that these speeds / travel times can change rapidly due to incidents on the road.

Speed map help


Navigate the map using:

  • Double click to zoom in
  • Use the magnifying glass tool to select pre-set zooms (such as Colorado, Denver, etc.)
  • Left click your mouse and drag to pan
  • Use the +/- buttons to zoom in and out
  • Click or drag the slider to change the zoom
  • Map overview tool (left bottom corner)

The zoom levels supported are from level 8 to 13 for the map

Speeds table


The Slow Downs tab shows road segments that have speeds below than 25 mphs on the highways. For city roads, the conditions are heavy or stopped. The All Roads tab lists all roads that CDOT currently calculates expected speeds and congestion.
Click on a particular road segment row in this table, and it will pan to that area on the map and display a balloon window with additional content (see balloon window below in this section). The Destinations tab lists routes such as Denver to Vail, etc.

The Travel Alerts tab lists all current Road Closures, Restrictions, Seasonal Closures, Partial Lane Closures and Road work. Click on a particular alert to see the location and more information about it.

The Speeds, Travel Times, and Congestion measures are calculated every 2 minutes between the hours of 5:00am and 12:00 midnight using complex algorithms. Click the Refresh button Refresh button on table (top right next to date in this table) to get the latest content

Speed legend

Two legends are presented as the data the highway displays is different from the city arterials. For the highways, the road speed is represented by these colors. For the city roads, a measure of congestion that takes the speed and occupancy into account is represented by these colors. This is because 25 mphs on I-70 means something totally different from 25 mphs on Speer Boulevard.
Speed balloon

Balloon window showing a Segment detail

Road Work Help
 
Road work map


All Road Construction, Maintenance Work currently being performed on the road ways by CDOT is represented on this page by icons. The bigger icon denotes high traffic impact severity work.

The map also lists any high traffic impact severe travel alerts as icons. All cameras are displayed as well. Click on an icon to view the current image, live streaming video content or more information about the alert.

Road work map help


Navigate the map using:

  • Double click to zoom in
  • Use the magnifying glass tool to select pre-set zooms (such as Colorado, Denver, etc.)
  • Left click your mouse and drag to pan
  • Use the +/- buttons to zoom in and out
  • Click or drag the slider to change the zoom
  • Map overview tool (left bottom corner)

The zoom levels supported are from level 8 to 13 for the map

Road work table


The Road Work tab lists the current road construction, maintenance and work being done by CDOT.

The data is updated daily. Click the Refresh button (top right next to date in this table) to get the latest content

Road work balloon

Balloon window showing an example Road Work alert and when it was last updated.

Devices Help
 
Devices map


Cameras (Streaming Video, Still and Camera Tours), Message Signs (also known as Overhead Message Boards), and Weather Stations are presented in the map using icons.

Devices map help


Navigate the map using:

  • Double click to zoom in
  • Use the magnifying glass tool to select pre-set zooms (such as Colorado, Denver, etc.)
  • Left click your mouse and drag to pan
  • Use the +/- buttons to zoom in and out
  • Click or drag the slider to change the zoom
  • Map overview tool (left bottom corner)

The zoom levels supported are from level 8 to 13 for the map


The Cameras tab lists the streaming, still and camera tours in sub tabs. The Message Signs and Weather Stations are listed in separate tabs. The Message Sign icon indicates whether the sign is blank or has a message. The Weather Stations have two types of icons, one with cameras and the others without.

Click the Refresh button (top right next to date in this table) to get the latest content for all the devices.

Devices legend

Legends for each type of device is displayed here.
Devices balloon

Balloon window showing an example Message Sign showing the current message displayed.