In Brockman v. State (1975), 31 Ill. Ct. Cl. 53, Claimants alleged that Respondent was negligent in designing a highway. The Brockman court noted the well-settled law that the State is not an insurer of the safety of all persons who use its highways. (Brockman at 56.) The Brockman claimants presented no testimony to indicate that the design of the highway and drains were not in conformity with accepted standards in the industry at the time they were constructed. The Court ruled that a single instance of a drain becoming clogged is not proof of negligent design. Brockman at 57. A State trooper testified that while there was a six-inch accumulation of water on the road at the site of the accident, he had driven over the highway many times and did not recall ever having seen water accumulate on the road prior to the accident. He further testified that he found a clogged drain beside the roadway from which he removed some debris. He testified that the road then drained in about 40 minutes. Further, witnesses for the State included the highway engineer, who testified that there had been no prior notice of any problems regarding water at the accident site. In addition, testimony established that on the day of the accident, the engineer in charge of that stretch of highway had assigned a two-man crew to clean and repair sewers on the very day of the accident. He testified that the men had covered that stretch of highway on the day of the accident removing debris from sewers.