Question: What began as a result of the size of the domestic market and the use of mass-production, that use's a radio station in metro Detroit as the primary provider of news involving it?

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DYWF: DYWF (93.1 FM), better known as 93.1 Brigada News FM Metro Cebu, is a music and news FM radio station owned and operated by Brigada Mass Media Corporation, and it also serves as the Visayas flagship station of the Brigada News FM Philippines.  The station's studio are located at 2nd Floor, Mariners Court Building, Legazpi Ext., Pier 1, Barangay San Roque, Cebu City, while its transmitter is located at 28th Floor, Winland Tower Condominium, Juana Osmeña Ext., Cebu City.  DYWF operates 24 hours a day, 7 days a week.  Brigada News FM Cebu is considered to be the over-all number one FM radio station in Cebu based on the KBP-Kantar Radio Surveys (Q4 2016) and the recent Nielsen Radio Audience Measurement Survey in 2017, and it continues to dominate the overall radio listenership in Cebu City, beating other FM stations in the market.

WHAD: WHAD (90.7 FM) is a non-commercial radio station licensed to the western Waukesha County community of Delafield, Wisconsin and serving the Milwaukee metropolitan area, transmitting from south of Delafield.  Part of Wisconsin Public Radio (WPR), it airs WPR's "Ideas Network", consisting of news and talk programming.  Like the Milwaukee area's other NPR station, WUWM (licensed to Milwaukee proper), the station airs BBC World Service in the overnight hours.  WHAD maintains a local news staff and cut-ins outside of the main WPR network, and the station's facilities, located on the seventh floor of 310 W. Wisconsin Avenue in Milwaukee (by coincidence, also hosting the studios of commercial sports radio station WAUK), originate some programming for the network, including Kathleen Dunn's afternoon program until her retirement in the summer of 2017.  WHAD has its own 414 studio line for Milwaukee callers to call into locally originated programs.  Because of the lack of a sister station providing WPR's News and Classical Network to Milwaukee, WHAD provides the HD2 Classical Network via HD Radio to the market via their HD2 subchannel, which only differs from the News and Classical Network in having a full-classical format overlaying NPR and APM news programming exclusive to WUWM in the market; it became the market's only classical music station over the air in 2007 after WFMR abandoned the format commercially.

WDFN: WDFN is a sports-talk radio station in the Detroit, Michigan, market.  It broadcasts in the AM radio band at 1130 kHz, which is a clear-channel frequency.  WDFN is not considered a clear-channel station because of its Class B status.  WDFN is owned by iHeartMedia, and until the end of the 2008-09 NBA season, was the flagship station for the Detroit Pistons.  It is affiliated with Fox Sports, as well as MRN and PRN for NASCAR coverage.  WDFN is one of several sports-talk stations in metro Detroit, the others being WXYT-AM (CBS Sports), WCAR (SB Nation Radio), and WXYT-FM ("The Ticket").  WDFN is the only one of the four sports stations that carries a significant amount of community programming and infomercials unrelated to sports.

KEC63: KEC63 (sometimes referred to as Detroit All Hazards) is a NOAA Weather Radio station that serves the Metro Detroit area and surrounding cities.  It is programmed from the National Weather Service forecast office in Detroit/Pontiac, Michigan with its transmitter located in Southfield, on WDIV's broadcast tower.  It broadcasts weather and hazard information for the following Counties: Lenawee, Livingston, Monroe, Oakland, St. Clair, Washtenaw, and Wayne.  Under exceptionally rare conditions, such as when KEC63 is down for maintenance or off the air from lighting strikes to its tower, Cleveland, Ohio's weather radio station, KHB59 can be faintly heard, since it also operates on 162.550 MHz.

WCHB: WCHB is an American AM radio station licensed to Taylor, Michigan, at 1200 kHz, and serving the Metro Detroit market.  Owned previously by Radio One, WCHB has identified as NewsTalk 1200 and 99.9 FM WCHB, and aired a News/Talk format, with Motown & Classic Soul during the late evening and overnight hours.  It is currently unknown what the new format will be under ownership of Crawford.

WRIF: WRIF (101.1 FM) — branded 101 WRIF: The RIFF — is a commercial active rock radio station licensed by the Federal Communications Commission (FCC) to operate in Detroit, Michigan serving surrounding Metro Detroit.  The station is currently owned by Beasley Media Group.  WRIF is a grandfathered "Superpower" Class B station with a signal equivalent to 92,000 watts at 500 ft; stated another way, under current U.S. Federal Communications Commission (FCC) limits for Class B stations, WRIF would be allowed to broadcast an effective radiated power (ERP) of no more than 16,000 watts using an antenna of height of 268 meters.  As such, the signal can be heard as far as Lexington, MI; Jackson; Chatham-Kent and Lambton County, Ontario; North Baltimore, Ohio; and occasionally as far south as Delaware, Ohio.  The station transmitter is located in the Detroit suburb of Southfield near the intersection of 10 Mile Road and Northwestern Highway, and transmits its signal from the same tower as WXYZ-TV.  WRIF's studios are in Ferndale.

WMUZ-FM: WMUZ-FM is an FM radio station in the United States serving the Detroit, MI market at 103.5 MHz.  The station has a contemporary Christian music and Christian talk format, known on the air as The Light.  WMUZ-FM's 50,000-watt signal extends north into metro Detroit, and Flint/Lapeer areas.

Automotive industry in the United States: The automotive industry in the United States began in the 1890s and, as a result of the size of the domestic market and the use of mass-production, rapidly evolved into the largest in the world.  However, the United States was overtaken as the largest automobile producer by Japan in the 1980s, and subsequently by China in 2008.  The U.S. is currently second among the largest manufacturer in the world by volume, with approximately 8-10 million manufactured annually.  Notable exceptions were 5.7 million automobiles manufactured in 2009 (due to crisis), and peak production levels of 13-15 million units during the 1970s and early 2000s.

WDET-FM: WDET-FM is a public radio station in Detroit, Michigan.  Licensed to Wayne State University in the city's Cass Corridor neighborhood, about a mile south of the New Center neighborhood, WDET broadcasts original programming and shows from National Public Radio, Public Radio International and American Public Media.  It broadcasts on the FM dial at 101.9 MHz.  The station serves Metro Detroit and is the primary provider of news involving the American automotive industry and Michigan politics within the NPR distribution network.

WXYT-FM: WXYT-FM (97.1 MHz) — branded 97-1 The Ticket — is a commercial FM radio station licensed to Detroit and serving the Metro Detroit, Michigan media market.  WXYT-FM is owned by CBS Radio and broadcasts a sports radio format.  Most programming is local with CBS Sports Radio supplying overnight and some weekend shows.  (Sister station WXYT 1270 AM carries the CBS Sports Radio Network around the clock.)

Supporting paragraphs: WDET-FM Automotive industry in the United States
Answer: automotive industry in the United States