Top 40 Tracks is a defunct airplay chart from Billboard Magazine. It was created in 1998, when Billboard Magazine changed the airplay profile of The Hot 100 Airplay

Hot 100 Airplay

The Hot 100 Airplay chart is a chart released weekly by Billboard magazine in the United States. It measures radio airplay, and is one of the three component charts, along with the Hot Singles Sales and the Hot Digital Songs charts, that determine the chart positions of singles on the Billboard...

 to include more R&B, Country

Country music

Country music is a popular American musical style that began in the rural Southern United States in the 1920s. It takes its roots from Western cowboy and folk music...

, and Rock

Rock and roll

Rock and roll is a genre of popular music that originated and evolved in the United States during the late 1940s and early 1950s, primarily from a combination of African American blues, country, jazz, and gospel music...

 stations to its profile (thus reducing the profile of its Pop stations). To preserve the notion of the former chart, Top 40 Tracks was introduced. The Top 40 Tracks consisted of Mainstream Top 40 audience impressions, as well as Rhythmic Top 40 and Adult Top 40 audience impressions which had previously broken off from the Mainstream Top 40 chart.

Unlike The Top 40 Mainstream, The Top 40 Tracks (like the Hot 100 Airplay) was based on total statistical impressions, not total detections. The Top 40 Tracks chart was replaced in March 2005 with the Pop 100 Airplay

Pop 100 Airplay

The Pop 100 Airplay was a chart created in 2005 and released weekly by Billboard in the United States. It measured mainstream radio airplay, and was one of the three component charts, along with the Hot 100 Singles Sales and Hot Digital Songs charts, that determined the chart positions of singles...

chart.