| Name | Type | Description | Notes |
|---|---|---|---|
| url | str | A URL for extra details, such as outline construction or maintenance plans. | [optional] |
| updated_at | str | Date/Time alert last updated | [optional] |
| timeframe | str | Summarizes when an alert is in effect. | [optional] |
| short_header | str | A shortened version of `*/attributes/header`. | [optional] |
| severity | int | How severe the alert it from least (`0`) to most (`10`) severe. | [optional] |
| service_effect | str | Summarizes the service and the impact to that service. | [optional] |
| lifecycle | str | Identifies whether alert is a new or old, in effect or upcoming. | Value |
| informed_entity | list[InformedEntity] | Entities whose users we should notify of this alert. See GTFS Realtime `FeedMessage` `FeedEntity` `Alert` `informed_entity` | [optional] |
| header | str | This plain-text string will be highlighted, for example in boldface. See GTFS Realtime `FeedMessage` `FeedEntity` `Alert` `header_text` | [optional] |
| effect_name | str | Name of the alert | [optional] |
| effect | str | The effect of this problem on the affected entity. | Value |
| description | str | This plain-text string will be formatted as the body of the alert (or shown on an explicit "expand" request by the user). The information in the description should add to the information of the header. See GTFS Realtime `FeedMessage` `FeedEntity` `Alert` `description_text` | [optional] |
| created_at | str | Date/Time alert created | [optional] |
| cause | str | What is causing the alert. | Value |
| banner | str | Set if alert is meant to be displayed prominently, such as the top of every page. | [optional] |
| active_period | list[ActivePeriod] | Date/Time ranges when alert is active. See GTFS Realtime `FeedMessage` `FeedEntity` `Alert` `active_period`. | [optional] |