Updated at 12:15 a.m. Tuesday: Revised to include a statement about Hull's death.

Grand Prairie ISD Superintendent Susan Simpson Hull died Monday following a motorcycle accident while on vacation in Arizona, the district said.

The crash occurred about 2:20 p.m. Sunday on Interstate 40 near the town of Twin Arrows, according to the Arizona Department of Public Safety. Hull, who was driving the motorcycle, was taken by ambulance to Flagstaff Medical Center, where she died.

No other vehicles or people were involved.

Additional details about what led to the crash were not available Monday night.

For the last 12 years, Hull, 60, has led the district as its superintendent. She had a total of 39 years of experience in education, serving as a teacher, coach, principal and superintendent in five school districts, Grand Prairie ISD said in a written statement.

Burke Hall, the president of the district's board of trustees, said in the statement that Hull would be sorely missed.

"This is a significant loss for the entire Grand Prairie ISD community as well as the education community at large," Hall said. "Over the past 12 years, Dr. Hull has made a significant impact on GPISD and helped establish our reputation around the globe. She also made a lasting difference in school children around Texas through her advocacy and creativity."

Under Hull, Grand Prairie ISD became a leader in school choice, the district said in its statement.

She was one of the first school leaders to fight back against the loss of students by stepping up the district's specialty programs.

Hull was the longest-serving school leader in Dallas County and one of the highest paid superintendents in the state, earning a salary of more than $400,000 per year.

Hull's compensation came under scrutiny in 2017 when the Grand Prairie school board hired an attorney to look into practices involved in the purchase and renovations of a district-owned home.

In 2005, Hull was selected as the Texas Superintendent of the Year by the Texas Association of School Boards and the Texas Association of School Administrators. She was also appointed by two governors, Rick Perry and Greg Abbott, to the State Board of Educator Certification in 2014 and 2015, respectively.

Hull was reportedly under consideration in 2015 to replace the state's education commissioner. Abbott appointed Dallas ISD trustee Mike Morath to the position in December 2015.

In a written statement Monday, Morath extended his condolences to Hull's family and praised her as a "warrior for students across Texas."

"Susan was a teacher's teacher and an admired champion for educational excellence, who had an unwavering dedication to improving the lives of every student she touched," he said. "Texas education will not be the same without her."

Commissioner Morath Statement On The Passing Of Grand Prairie ISD Superintendent Susan Hull pic.twitter.com/2jPU3wUmfY — TX Education Agency (@teainfo) July 9, 2019

Gordon Taylor, the executive director of the Region 10 Education Service Center, said in a written statement that Hull's death was a "loss for all of us and for school children not just in Grand Prairie ISD, but across the state of Texas." The center provides support services for schools, including those in Grand Prairie ISD.

Hull obtained a bachelor's degree from East Texas State University in 1980 and a master's in education from the same university in 1989. In 1993, Hull got her superintendent certification from UT-Tyler. Hull received a doctorate in educational administration from Texas A&M University in 2003.

The district said that Hull was with her family when she died. She and her husband, Kent, had four children and four grandchildren, according to the district.

Services are pending.