Data Feeds
Welcome to the CHART WEB Data Feeds. We provide data in two formats, JSON and REST.
| Field | Description |
|---|---|
| description | A brief description of the incident |
| source | The source of event |
| type | The type of event |
| closed | State of event |
| trafficAlertTextMsg | Traffic Alert Test Message |
| incidentType | Description of incident type |
| opCenter | The Maryland State Highways operations center that reported the incident |
| participants | Incident response units |
| createTime | Date and time the incident was created |
| direction | Normal travel direction of the lane(s) affected by the incident |
| lon | Taken with longitude to locate the incident on a map |
| startDateTime | Date and time the incident was open |
| lat | Taken with latitude to locate the incident on a map |
| other | Reserved for future use |
| lanesStatus | A brief description of the lane status |
| county | County were event exists |
| trafficAlert | Traffic alert flag |
| lanes | Current state of the lanes. Values are open, closed, unknown and reversed |
| vehicles | The number of vehicles involved in the incident |
| lastCachedDataUpdateTime | Last update time on a server |
| name | Name of the event |
| id | Unique identifier assigned to each incident |
| Field | Description |
|---|---|
| reason | A brief description of the reason the work is being performed |
| closureStartDate | Date that work is expected to begin |
| closureStartTime | Time of day that work is expected to begin |
| publicComments | Comments regrding the closure that SHA wants to share with the public |
| planned | This boolean field indicates planned closure |
| trackingNumber | A unique identifier assigned to each closure |
| closureEndDate | Expected completion date of work |
| closureEndTime | Time of day work will cease |
| closureDays | Days of the week that lanes will be closed |
| lanesClosed | A brief description of the lane status |
| description | A brief description of the closure |
| direction | Normal travel direction of lanes closed |
| opCenter | The Maryland State Highways operations center that reported the closure event |
| createTime | Date and time closure was created |
| name | Name assigned to closure event |
| id | Unique identifier for each closure event |
| source | Source of the cosure event |
| type | Type of closure |
| closed | This boolean field indicates event is closed |
| trafficAlertTextMsg | The message associated with closure |
| incidentType | The type of incident |
| participants | SHA units participating in event |
| lon | Taken with latitude to locate the incident on a map |
| lat | Taken with longitude to locate the incident on a map |
| startDateTime | Date and time that work is expected to begin |
| other | Reserved for future use |
| lanesStatus | Description of the closed lanes |
| county | A county in Maryland |
| trafficAlert | This boolean field indicates whether or not closure has traffic alert message |
| lanes | Current state of the lane. Values are open, closed, unknown and reversed |
| vehicles | The number of vehicles involved in the incident |
| lastCachedDataUpdateTime | Last time when cache was updated on server |
| Field | Description |
|---|---|
| description | Physical location of the traffic camera |
| commMode | Camera comunication mode |
| opStatus | Operation status of the camrea |
| routePrefix | Route Type (US, MD, I) |
| routeSuffix | Route suffix |
| cctvIp | URL for access to the video streamer |
| cameraCategories | Reserved for future use |
| milePost | Locate the traffic camera on a map |
| routeNumber | The route where camera located |
| lon | Taken with longitude to locate the traffic camera on a map |
| lat | Taken with latitude to locate the traffic camera on a map |
| publicVideoURL | URL for access to the camera |
| lastCachedDataUpdateTime | Last time cache was updated on the server |
| name | Name assigned to the camera |
| id | Unique identifier assigned to each camera |
| Field | Description |
|---|---|
| description | The physical location of the speed sensor |
| commMode | Speed sensor comunication mode |
| opStatus | Operation status of the speed sensor |
| rangeOnly | Flag indicate the range |
| owningOrg | Organization owning speed sensor |
| rotation | The angle of rotation of the TSS detection area that is parallel to the direction of travel |
| direction | Direction of normal traffic flow |
| lon | Taken with longitude latitude to locate the speed sensor on a map |
| lat | Taken with latitude to locate the speed sensor on a map |
| speed | Traffic speed. This may be supplied as a single value or as a speed range |
| lastUpdateTime | Last Tme speed sensor data was updated |
| zones | Grouping of speed sensor objects from a single detector, usually by direction |
| lastCachedDataUpdateTime | Last time cache was updated on server |
| name | Name assigned to the speed sensor |
| id | Identifier assigned to the speed sensor |
| Field | Description |
|---|---|
| description | The physical location of the weather station |
| lastUpdate | Date and time of the last report from the weather station |
| gustSpeed | Wind gust speed in miles/hour |
| dewPoint | Dewpoint temperature in degrees Farenheit |
| airTemp | Air temperature in degrees Farenheit |
| visibility | Average visibility in miles |
| pavementTemp | Pavement temperature in degrees Farenheit |
| windDescription | Average wind speed and direction |
| lon | Taken with latitude to locate the weather station on a map |
| lat | Taken with longitude to locate the weather station on a map |
| relativeHumidity | Relative humidity. |
| precipitationType | Type of precipitation detected by the weather station |
| lastCachedDataUpdateTime | Last time when cache was updated on the sever |
| name | Name assigned to the speed sensor |
| id | Unique identifier for each speed sensor |
| Field | Description |
|---|---|
| description | Physical location of the highway message sign |
| commMode | Communications mode of device |
| msgHTML | The message that is currently displayed on the highway message sign in HTML format |
| msgPlain | The message that is currently displayed on the highway message sign in plain text |
| beaconsEnabled | Boolean field indicates whether or not the beacon is flashing (see hasBeacons field) |
| msgMulti | The message that is currently displayed on the highway message sign formated as multiple lines |
| opStatus | Operation status of the highway message sign |
| lon | Taken with longitude to locate the highway message sign on a map |
| lat | Taken with latitude to locate the highway message sign on a map |
| hasBeacons | Boolean indicates if highway message sign has a beacon |
| lastCachedDataUpdateTime | Last time cache was updated on server |
| name | Name assigned to the highway message sign |
| id | Identifier assigned to the highway message sign |
| Field | Description |
|---|---|
| timeLifted | Date and time (Eastern Standard Time) Snow Emergency was lifted |
| timeDeclared | Date and time (Eastern Standard Time) Snow Emergency was decalred |
| countyPolygons | County boundaries effected by snow emergency |
| countyID | Id of the county effected by snow emergency |
| snowEmergencyExceptionMsg | Text describing exceptions to the Snow Emergency |
| lastCachedDataUpdateTime | Last time when cache was update on server |
| name | County affected by snow emergency |
| id | Unique identifier for the snow emergency |
| Field | Description |
|---|---|
| County | County effected |
| Shop | Shop name |
| Interstate | Interstate Weather Road Conditions |
| Primary | Primary Weather Road Conditions |
| Secondary | Secondary Weather Road Conditions |
| Last Update | Last time data was updated |
| Note: Equipment currently appearing in the data feed will be deprecated in a future release |