WASHINGTON, D.C. (WUSA9) -- Raw video released prior to the broadcast of an undercover WUSA9 investigation shows segments shot during a month long investigation where 25% of black passengers were left stranded by DC cabs.

The hidden camera investigation airs Monday on WUSA9 at 11:00 p.m.

To know about developments in our DC Taxi investigations first, follow@russptacek on TwitterorFacebook.

During the test, WUSA9 stationed a white decoy 100 feet in front of the black passenger attempting to hail a cab.

Cabbies chose the white passenger 25% of the time.

Monday night, WUSA9 is documenting the taxi problem - and a possible mobile phone solution to DC cabbie discrimination.

The month long undercover operation identified black passengers being passed in favor of white passengers 100 feet down the street, being ordered out by a cabbie who received a radio call for another fare, and being refused service to destinations in the District, Maryland, and Virginia.

A December WUSA9 undercover investigation identified similar problems including one cabbie who admitted he didn't want to take the black passenger because he claimed another black man had just refused to pay him.

Click here to see our December investigation:

Taxi discrimination isn't new to Washington and has been documented by WUSA9 since the 90's.

WUSA9 has activated a mobile upload site, and will begin a campaign encouraging passengers to record transactions with suspect cabbies and submit the videos if violations occur.

Passengers can use theWUSA9 iAlert,e-mail their videos directy, or their mobile phone browser.

The DC Office of Human Rights and the DC Taxi Commission have both agreed to review videos collected by WUSA9 for signs of discrimination or violations of policy.

DC's Taxi Commission chairman says refusing to take a passenger to the requested destination could result in a $500 fine.

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