Outside of the regularly scheduled full-screen graphical segments, weather data is also inserted over the channel's national feed via the Lower Display Line (LDL); the LDL was originally displayed as a text-only overlay over the bottom third of the video feed on older STAR units up to the Weather Star Jr. model, containing no graphical background and only showing current weather observations and monthly precipitation totals for the chosen reporting station (the text LDL was removed when The Weather Channel added an LDL specific to the national feed on March 11, 2010). A semi-translucent background was introduced to the LDL with the release of the Weather Star XL, which added local weather forecasts; the IntelliStar later added air quality indexes, travel forecasts for three cities in the region, traffic information and almanac data among the products it displayed. The LDL used on IntelliStar units was redesigned on November 12, 2013, and began to appear throughout all programming on the national feed (including commercial breaks and telecasts of its long-form programs), while being replaced by a segment rundown/progress bar on the full-screen forecast segments. A sidebar was also paired with the LDL on the right third of the screen, visible only to those watching the channel's high definition simulcast feed, which generates supplementary data (including average delay times for area airports; visibility, dew point and barometric pressure data, which was previously shown on the LDL; air quality forecasts; and almanac data); unlike the LDL, the sidebar is removed during commercial breaks and is only shown during the channel's forecast programming.