RADCLIFF, Ky. (AP) _ A year ago, three ambulance drivers took injured children to hospitals after the deadliest drunken-driving-related traffic accident in U.S. history.

On Mother's Day, Lannis Garnett, his wife, Gladys, and Mayme Walters were among guests at services marking the first anniversary of the crash that killed 24 children and three adults aboard a church bus and left many of the 40 survivors with severe burns.

''You relive it quite often,'' said Garnett, who with his wife operates Owen County Life Squad at Owenton. ''If anything, it gets more clear as time goes on.''

The bus burst into flames after colliding with a pickup that police said was being driven on the wrong side of Interstate 71 by a drunken driver.

The crash occurred near Carrollton, about 100 miles northeast of Radcliff, the post town outside Fort Knox. The driver of the pickup, Larry W. Mahoney, faces trial in November on 27 counts of murder and one count of drunken- driving.

At a community memorial service that capped a day of remembrance, a minister said that, ''in some ways, today is worse than others'' for the injured and families of the dead.

''It's the first anniversary, combined with Mother's Day, of all things,'' said Rev. David A. Seamands, a professor at Asbury Theological Seminary in Wilmore.

''That first anniversary is the toughest,'' he said. ''Just when you think you're getting a handle on it, you get ambushed ... and that hole in your heart is as big as a canyon.''

The memorial service was the last of three ceremonies Sunday, the first drawing several hundred people and the last two more than 1,000 apiece.

The first was the unveiling of a black granite monument at the cemetery where many of the victims were buried. Engraved on the monument are names of those who were aboard the bus.

The monument was unveiled by six children, including four crash survivors: Aaron Conyers, 16, Harold Dennis, 15, Carey Aurentz, 15, and Katrina Muller, 14. Two others were children of crash victims - John R. Pearman Jr., whose father drove the bus, and Charles J. Kytta III, whose father was youth minister at the church that owned the bus, Radcliff First Assembly of God.

Then came a ceremony in which members of a surviving-family support group thanked individuals and organizations that helped them in the past year.

The names of the victims were read and family members placed a yellow rose for each on one of 27 wreaths of yellow carnations.

Gov. Wallace Wilkinson and his wife, Martha, then placed roses on a larger wreath of yellow roses and white carnations.

Earlier, the pastor of the Radcliff church, Rev. W. Don Tennison, said a prayer for laws that would ''make it too costly to get into an automobile ... drunk.''

President Bush sent a telegram that called drunken driving a national tragedy and said laws against it must be strictly enforced.

''While reserving judgment against any individual until the judicial process has run its course, we must guard against complacency about the overall problem,'' the telegram said.

For the Garnetts, and Ms. Walters, of Gallatin County Life Squad in Warsaw, it was a return visit. They attended a candlelight vigil here in December and said they had kept in contact with the children they transported last May 14.

Highway accidents are common in their business, but the enormity of the Carrollton crash keeps it vivid, said Garnett.

''We may deal with a child every so often, but nothing like that,'' he said. ''Twenty-four kids is just overwhelming.''