New Metro fares are scheduled to go into effect today, raising most minimum charges for bus and subway rides by 10 cents.

During rush hours, minimum rail fares will rise to 75 cents. An additional charge of 14.5 cents a mile will be added for trips longer than three miles. Rush-hour fares are in effect from 6 a.m. to 9:30 a.m. and from 3 p.m. to 6:30 p.m. on weekdays. At all other times, rail fares will be 75 cents and no mileage charge will be added.

Most minimum bus fares will increase to 75 cents during rush hours. At all other times, basic bus fares will be 70 cents in the District of Columbia and 75 cents in Maryland and Virginia.

Transfers between buses will remain free. Transfers from subway to bus will be free in the District and will provide a 25 cent discount in Maryland and Virginia. Most bus zone fees will be unchanged.

For elderly and handicapped riders, bus fares will be 25 cents within the District and Maryland and 35 cents in Virginia. Rail fares for elderly and handicapped passengers will be half price up to a maximum of 75 cents. Special rates for trips between Maryland and the District will be 50 cents; between the District and Virginia they will be 60 cents.

The new fares were approved by Metro's board of directors in March after a protracted debate.