Aрpellants, husband and wife, filed this negligence action against Potomac Electric Power Company (“Pepeo”) and the District of Columbia. They alleged in their complaint that a portion of a defective street light fixture fell on their car, causing an accident which resulted in bodily injury and property damage. The trial court granted summary judgment in favor of both defendants. We affirm.
I
On July 1,1991, appellant Rajabi was driving her husband’s car westbound on Canal Road, N.W., when a large glass globe, part of an overhead street light fixture, suddenly fell on the car. Ms. Rajabi was startled and lost control of the car, which ran up onto the curb. As a result of these events, Ms. Rajabi allegedly suffered serious injuries. At that time Pepeo was obligated under a contract with the District of Columbia to replаce high-pressure sodium vapor street lamps, such as the ones on Canal Road, once every five years and to clean the fixtures once a year. The same contract rеquired Pepeo to inspect and repair the fixtures while in the process of replacing the lamps.
According to the terms of the contract, Pepeo was scheduled to replace the Canal Road lamps and clean the fixtures in 1991. Since the previous cleaning had been performed in May of 1990, Pepeo scheduled both the cleaning and the replaсement of the lamps for May 1991. However, because of budgetary constraints and the low burnout rate observed in a citywide survey, the District asked Pepeo to defer replacement of these street lights until September 1991. Pepeo complied and postponed the cleaning of the light fixtures until the same time.
Appellants 1 sued the District of Columbia and Pepeo under theories of negligence and res ipsa loquitur, arguing that both defendants had a duty to maintain the light fixtures so as to prevent harm to passing motorists. They claimed that the District and Pepeo were negligent because they had failed tо perform an inspection of the street lights within twelve months after the previous inspection, as the maintenance contract required. After a hearing, the trial court granted summary judgment in favor of both defendants, ruling that appellants had not identified a defect in the light fixture, nor had they offered any evidence to demonstrate that either the District or Pepeo had actual or constructive notice of any such defect or that either of them had deviated from the applicable standard of care.
II
Our review of an order granting summary judgment is limited to determining whethеr the trial court properly ruled that there was no genuine issue of material fact for trial.
See, e.g., Allen v. Hill,
Appellants claim that the language in the maintenance contraсt which requires Pepeo to provide “one cleaning per year” is susceptible of two different interpretations 2 and thus gives rise to an issue of material *1322 fact. This argument is without merit. The asserted ambiguity of the contractual language would create an issue of material fact only if it were relevant to determining the District’s or Pepeo’s negligence. We agree with the trial court that, even if the language were construed in appellants’ favor, appellants failed to demonstrate that the contract established a standard of care. Since there was no other evidence from whiсh the jury could determine a standard of care, the trial court correctly granted summary judgment for Pepeo and the District.
At the outset we note that, although the District of Columbia has a duty to maintain its streets in a reasonably safe condition,
District of Columbia v. Freeman,
Appellants alleged that the light globe that fell on their car was defective, but they failed to identify the supposed defect.
See District of Columbia v. Jones,
Appellants argue that the District and Pepeo would have had notice, actual or constructive, if they had exercised reasonable care by following the twelve-month cleaning schedule outlined in the contract. They contend that the contract established the standard of carе, and that the defect would have been discovered if Pepeo had inspected the street lights in May 1991 as originally scheduled. We agree with the trial court that appellants failed to establish, by expert testimony or otherwise, that the maintenance schedule prescribed in the contract (under either interpretation of the language, see note 2, supra) was sufficient tо prevent a dangerous condition from developing or that a deviation from the schedule proximately caused the globe to fall. In other words, the maintenance schedule itself did nоt define the standard of care, and appellants failed to present any other proof of such a standard.
The standard of care must be established through expert testimony when the subjеct matter at issue is so distinctly related to some science, profession, business, or occupation as to be beyond the ken of the average lay person.
E.g., District of Columbia v. Davis, supra,
Appellants’ alternative claim of liability under a theory of
res ipsa loquitur
is equally without merit. In order to hold either defendant liable under
res ipsa loquitur,
appellants must shоw, among other things, that the light globe was in the exclusive control of one or both defendants and that its sudden fall was unlikely to have occurred in the absence of negligence.
See Hackett, supra,
The order granting appellees’ motion for summary judgment is thereforе
Affirmed. 5
Notes
. Appellant Rajabi sued for personal injuries suffered in the accident. Appellant Fard, who apparently was not involved in the accident, sued only for property damage, sincе he was the registered owner of the car.
. Appellants maintain that this language requires the lights to be cleaned at twelve-month intervals, whereas Pepeo contends that the contrаct requires a cleaning at any time during a given calendar year.
. The record shows that the District and Pepeo had no record of complaints about faulty light fixtures in the Canal Road area at any time relevant to this case.
.
Husovsky
v.
United States,
. In view of our holding that appellants failed to present any evidence of a standard of care, we need not consider the District’s and Pepeo’s alternative arguments for affirmance.
