I WAS DRIVING COMING FROM MY SISTER IN LAWS HOUSE AT GRANDVIEW, WASHINGTON LEAVING AROUND 7:40 AM HEADING HOME TO SEATTLE GOING WEST TO INTERSTATE-82 ON FRIDAY, AUGUST 22, 2008 WITH MY THREE KIDS. I WAS USING MY CRUISE CONTROL AND STAYED ON THE LEFT LANE FOR ABOUT 20 TO 30 MINUTES. WE JUST LEFT YAKIMA CITY AND HEADED TO THE FRED REDMON MEMORIAL BRIDGE AT AROUND 8:30 AM GOING UP HILL, IN WHICH I SAW TWO TRACTOR-TRAILER FAR IN ADVANCE AND BOTH WERE DRIVING ON THE RIGHT LANE. THE LEFT LANE WAS OPEN AS I DROVE IN TO THE BRIDGE BUT THEN THE OTHER TRACTOR-TRAILER MADE A CHANGE TO GO TO THE LEFT LANE. I WAS PROBABLY 50 FEET AWAY WHEN THE OTHER TRACTOR-TRAILER MADE THE CHANGE TO THE LEFT LANE. I WAS CRUISING ABOUT 50 TO 60 MPH IN WHICH I HAVE TO PUT MY RIGHT FOOT ON THE BRAKE PEDAL. AT FIRST, I THOUGHT I STEP ON MY GAS PEDAL BECAUSE THE CAR DID NOT SLOWDOWN A BIT. I PRESSED THE BUTTON TO TURN OFF THE CRUISE CONTROL AND HIT THE FOOT BRAKE AGAIN AND AGAIN. I THEN REALIZED THAT MY BRAKES DID NOT WORK. AS I WAS GETTING TOO CLOSED TO THE LEFT LANE TRUCK, I PANICKED AND MADE A CHANGE TO GO TO RIGHT AND REAR-ENDED THE VOLVO TRACTOR-TRAILER. *TR