Arbitron and Radio One Sign Five-Year Agreement for Portable People Meter(TM) Radio Rating Services.

Agreement also extends diary-based ratings services in one market outside the top 50 radio metros

NEW YORK -- Arbitron Inc. (NYSE: ARB) today announced that Radio One, Inc. ("Radio One") (NASDAQ: ROIAK and ROIA), the largest radio broadcasting company that primarily targets African-American and urban listeners, has signed a five-year contract for radio ratings services in 16 markets. The agreement includes Portable People Meter ratings services in 15 top-fifty markets and a continuation of the diary-based ratings services in one market.

The PPM agreement covers 15 Radio One markets encompassed in Arbitron's previously announced PPM rollout plan: Atlanta, Baltimore, Cleveland, Cincinnati, Charlotte, Columbus, Dallas, Detroit, Houston, Indianapolis, Los Angeles, Philadelphia, Raleigh, St. Louis and Washington D.C.

Alfred C. Liggins, III, chief executive office and president, Radio One stated: "Electronic measurement is providing compelling evidence about the power of Urban radio to reach and engage the African American consumer. It is also demonstrating the 'working persons' advantage that Urban radio offers marketers who want to reach the brand conscious and brand loyal African-American consumer."

"I commend Arbitron for its willingness to address the concerns expressed by urban broadcasters. I look forward to helping guide the process of enhancing the sampling of African-Americans in the PPM service in order improve the utility of the PPM ratings for all broadcasters."

Over the next three years, Arbitron is scheduled to deploy the Portable People Meter ratings service in the top 50 markets in place of the paper diary method that the company has used to collect radio audience estimates since 1965.

About Radio One

Radio One, Inc. (www.radio-one.com) is one of the nation's largest radio broadcasting companies and the largest radio broadcasting company that primarily targets African-American and urban listeners. Pro forma for recently announced transactions, Radio One owns and/or operates 60 radio stations located in 19 urban markets in the United States. Additionally, Radio One owns Magazine One, Inc. (d/b/a Giant Magazine) (www.giantmag.com), interests in TV One, LLC (www.tvoneonline.com), a cable/satellite network programming primarily to African-Americans and Reach Media, Inc. (www.blackamericaweb.com), owner of the Tom Joyner Morning Show and other businesses associated with Tom Joyner. Radio One also operates the only nationwide African-American news/talk network on free radio and programs "XM 169 The POWER," an African-American news/talk channel, on XM Satellite Radio.

About Arbitron

Arbitron Inc. (NYSE: ARB) is an international media and marketing research firm serving the media - radio, television, cable, online radio and out-of-home - as well as advertisers and advertising agencies in the United States and Europe. Arbitron's core businesses are measuring network and local market radio audiences across the United States; surveying the retail, media and product patterns of local market consumers; and providing application software used for analyzing media audience and marketing information data. The company has developed the Portable People Meter, a new technology for media and marketing research.

Arbitron's marketing and business units are supported by a world-renowned research and technology organization located in Columbia, Maryland. Arbitron has approximately 2,100 employees; its executive offices are located in New York City.

Through its Scarborough Research joint venture with The Nielsen Company, Arbitron provides additional media and marketing research services to the broadcast television, newspaper and online industries.

Portable People Meter(TM) and PPM(TM) are marks of Arbitron Inc.

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The statements regarding Arbitron Inc. and its subsidiaries ("we," "our," "Arbitron" or the "Company") in this document that are not historical in nature, particularly those that utilize terminology such as "may," "will," "should," "likely," "expects," "anticipates," "estimates," "believes," or "plans," or comparable terminology, are forward-looking statements based on current expectations about future events, which Arbitron has derived from information currently available to it. These forward-looking statements involve known and unknown risks and uncertainties that may cause our results to be materially different from results implied in such forward-looking statements. These risks and uncertainties include, in no particular order, whether we will be able to:

* successfully implement the rollout of the Portable People Meter service;

* renew contracts with large customers as they expire;

* successfully execute our business strategies including entering into potential acquisition, joint-venture or other material third-party agreements;

* effectively manage the impact of any further ownership shifts in the radio and advertising agency industries;

* respond to rapidly changing technological needs of our customer base, including creating new proprietary software systems and new customer products and services that meet these needs in a timely manner;

* successfully manage the impact on our business of any economic downturn generally and in the advertising market in particular;

* successfully manage the impact on costs of data collection due to lower respondent cooperation in surveys, privacy concerns, consumer trends, technology changes and/or government regulations;

* successfully develop and implement technology solutions to measure multi-media and advertising in an increasingly competitive environment; and

* successfully obtain and/or maintain Media Rating Council accreditation for our audience measurement services.

Additional important factors known to Arbitron that could cause actual results to differ materially from our forward-looking statements are identified and discussed from time to time in Arbitron's filings with the Securities and Exchange Commission, including, in particular, the risk factors discussed under the caption "ITEM 1A. RISK FACTORS" in Arbitron's Annual Report on Form 10-K for the year ended December 31, 2006.

The forward-looking statements contained in this document speak only as of the date hereof, and Arbitron undertakes no obligation to correct or update any forward-looking statements, whether as a result of new information, future events or otherwise.