Following a bench trial, the Court of Claims entered a judgment of no cause of action on plaintiffs claims of negligent highway design, MCL 691.1402; MSA 3.996(102), and intentional nuisance. Plaintiff appeals as of right. We affirm.
Plaintiff was traveling northward on US-23 when her vehicle veered to the right onto the east shoulder. Plaintiff overadjusted the car leftward to the centerline. She then overcorrected to the right and struck the guardrail to the east of the highway. The car traveled along or possibly on top of the guardrail until it reached an opening where a private driveway intersected the highway. The car proceeded through the opening, struck one of numerous trees in the vicinity, and eventually came to rest at the bottom of a ditch or gully approximately 15 feet below the highway.
US-23 at the site of plaintiffs accident is a two-lane, paved, state trunk highway. The guardrail which plaintiff struck was located eight and one-half feet from the eastern edge of the northbound lane. It protected motorists from plunging down a steep embankment with a ”one:two” slope (a one-*694foot vertical drop for each two horizontal feet). The driveway opening in the guardrail was approximately 39 feet wide. Plaintiff hit a tree which stood 25 feet from the driveway and 16 feet from the highway.
In count I of her complaint, plaintiff claimed that she had been injured as a proximate result of defendant’s negligence. Plaintiff asserted that defendant breached its duty to maintain the highway in a reasonable, safe and fit manner in the following ways: allowing to remain and failing to remove a large tree located within 20 feet of the highway; failing to guard, protect, or give notice to traveling motorists of a 15-foot fill located at the base of an unprotected tree, and within 20 feet of the traveled highway; failing to guard, protect or give notice of a large tree within 20 feet of the highway; installing a guardrail in such a manner as to channel, funnel or direct an errant automobile into a fixed roadside obstacle, the tree; allowing the driveway to exist and building a guardrail with a gap of 39 feet. In count II, plaintiff claimed that, in breaching its duty as set forth in count I, defendant created and maintained an intentional nuisance in fact.
The trial court found that the placement of the guardrail was warranted by the steep slope off the eastern side of the road. Defendant was required to permit persons living along that portion of the highway access to the road by allowing the existence of a driveway and by creating an opening in the guardrail for a driveway. The trial court determined that there was insufficient evidence to justify a finding that plaintiff would not have been as severely injured if a barrier had been erected around the tree or if a barrier had been placed along the north edge of the driveway. The trial court further determined that the standards of the *695American Association of State Highway and Transportation Officials (aashto), see, 23 CFR 625 et seq., did not establish minimum safety standards for the placement of barriers, but were mere guidelines or "goals” for state highway departments. According to the trial court, strict compliance with the aashto standards was impractical in the instant case due to environmental and financial constraints. Moreover, the trial court found that defendant’s placement and maintenance of the guardrail were not contrary to the general principles set forth by aashto. the trial court concluded that defendant had not breached its duty to maintain US-23 in a reasonably safe condition.
In addition, the trial court found that defendant was not liable for maintenance of an intentional nuisance. The court noted that defendant had not negligently or improperly constructed the guardrail so as to purposely direct errant vehicles into the tree. The tree itself provided motorists with no greater hazard than would the placement of barriers around the tree or down the side of the highway.
Under MCL 691.1402, defendant may be held liable for failure to maintain a highway in reasonable repair:
"Each governmental agency having jurisdiction over any highway shall maintain the highway in reasonable repair so that it is reasonably safe and convenient for public travel. Any person sustaining bodily injury or damage to his property by reason of failure of any governmental agency to keep any highway under its jurisdiction in reasonable repair, and in condition reasonably safe and fit for travel, may recover the damages suffered by him from such governmental agency. * * * The duty of the state and the county road commissions to repair and maintain highways, and the liability *696therefor, shall extend only to the improved portion of the highway designed for vehicular travel and shall not include sidewalks, crosswalks or any other installation outside of the improved portion of the highway designed for vehicular travel.”
This statutory duty is not limited to the paved portion of the road, but includes proper maintenance of the shoulder and adjacent guardrails. McKee v Dep’t of Transportation, 132 Mich App 714, 721; 349 NW2d 798 (1984); Moerman v Kalamazoo County Road Comm, 129 Mich App 584, 592; 341 NW2d 829 (1983); Hall v Dep’t of State Highways, 109 Mich App 592; 311 NW2d 813 (1981), lv den 413 Mich 942 (1982). It "extends to the maintenance of conditions that affect the safety of motorists using the improved portion of the highway designed for vehicular travel”. Moerman, supra, p 592. In Moerman, p 593, this Court held that whether the defendant had a duty to "maintain” a tree turned on whether "the tree was positioned such that the average vehicle could have struck the tree without any of the vehicle’s wheels leaving the shoulder”. (Emphasis added.)[1]
In this case, plaintiffs automobile was out of control and had completely departed from the road when it struck the tree. The tree was not within reach of a vehicle with all four wheels on the shoulder. We must bear in mind the Legislature’s restriction of defendant’s duty "only to the improved portion of the highway designed for vehicular travel.” MCL 691.1402. The particular allegations of negligence which are based solely on *697defendant’s failure to remove or guard the tree do not, in our view, constitute a viable claim under MCL 691.1402. Additionally, we have reviewed the photographic exhibits admitted at trial. This was a country road lined by numerous trees and other vegetation. Defendant’s duty to maintain the road in reasonable repair does not entail deforestation of the surrounding countryside.
Plaintiffs remaining claims involve the design of the guardrail. More particularly, she asserts that the driveway opening was too wide and that the guardrail channeled her car into the unguarded tree. According to plaintiff, these deficiencies violated aashto standards which, again in her view, are mandatory and set the minimum standard of care in the field of highway maintenance. Plaintiff also claims that the existence of these conditions constituted an intentional nuisance. The trial court found for defendant on each of these claims.
"This Court does not set aside the trial court’s findings of fact unless they are clearly erroneous. GCR 1963, 517.1; Borkus v Michigan National Bank, 117 Mich App 662, 670; 324 NW2d 123 (1982). A finding is clearly erroneous when, although there is evidence to support it, the reviewing court on the entire evidence is left with a definite and firm conviction that a mistake has been committed. Tuttle v Dep’t of State Highways, 397 Mich 44, 46; 243 NW2d 244 (1976); Borkus, supra, p 670.” Sasanas v Manufacturers National Bank of Detroit, 130 Mich App 812, 817; 345 NW2d 621 (1983).
In this case, we find no clear error by the trial court.
Plaintiff argues that the gap in the guardrail was unreasonably wide. The owner of the abutting property has a right of access to the land itself from the highway. State Highway Comm v Sandberg, 383 Mich 144, 148-149; 174 NW2d 761 (1970). *698Under current law, the state has regulatory authority over such driveways, MCL 247.321 et seq.; MSA 9.140(21) et seq., but this authority does "not apply to driveways in existence on August 6, 1969”. MCL 247.327; MSA 9.140(27). The driveway in question existed prior to August 6, 1969. The state lacked authority to close the driveway completely with a guardrail. The issue is whether the opening was unreasonably large.
A supervisory design engineer employed by defendant testified that driveway openings should be as narrow as is "practical”, given the angle of the driveway and the size and speed of vehicles which are used to enter it. The driveway in this case ran parallel to the highway until it approached the intersection, where there was a sharp curve. This necessitated a wider than normal opening to permit safe entry. In the witness’s opinion, the gap was not unreasonably wide. Another expert witness agreed with this analysis. It is noteworthy that plaintiff’s expert witness testifed that the driveway was difficult to enter even in its present state.
Plaintiff urges that defendant is liable because the driveway opening directed her vehicle into the tree. According to plaintiff, if one could not reasonably expect defendant to narrow the opening, defendant could have prevented her injuries by placing a barrier between the opening and the tree, or around the tree itself. We are not left with a definite and firm conviction that the Court of Claims erred by rejecting this view of the evidence. There was expert testimony that, given the velocity of plaintiff’s vehicle and the steep decline, an abrupt collision with a barrier would have been just as injurious to her or more so. Furthermore, we perceive once again in this argument a not so subtle effort to stretch defendant’s duty to a point *699beyond that contemplated by the Legislature. MCL 691.1402. Defendant did not act negligently by creating the opening. We cannot say that by doing so it shouldered responsibility for every tree within range of a vehicle careening through that opening.
Plaintiff argues that the aashto standards are mandatory and signify the minimum standard of care in highway design. We disagree. The standards are goals utilized by governmental agencies. They "are intended as guidelines for those reponsible for the design, installation, and maintenance of traffic barriers”. 23 CFR 625.3(20), I-C (emphasis in original):
"* * * It is recognized that limited budgets may preclude the full implementation of these guidelines. In those cases, a priority system should be established to insure that cost-effective alternatives are employed.
"The guide relates primarily to the protective aspects of traffic barriers. These guidelines must be considered together with social, environmental, and economic factors.
"Due to the complex nature of the subject matter, many of the criteria contained in this guide are by necessity based on subjective data. In some areas, only general suggestions and recommendations can be made. It can therefore not be overemphasized that application of these guidelines must be made in conjunction with sound evaluation of the facts and engineering judgment to effect the proper solution.” Id. (Emphasis in original.)
Even if the standards were mandatory, we would reject plaintiffs contention that violations of the standards constitute negligence as a matter of law. In this state, violations of statutes, rules and regulations are evidence of negligence and establish a prima facie case, "with the determination to be made by the finder of fact whether the party accused of violating the statute has estab*700lished a legally sufficient excuse”. Zeni v Anderson, 397 Mich 117, 143; 243 NW2d 270 (1976); Beals v Walker, 416 Mich 469, 481; 331 NW2d 700 (1982).
The Court of Claims found that defendant complied with the standards. The court took note of the various budgetary, environmental and safety considerations. In addition, the court found itself unable to conclude that plaintiff would have fared better even if defendant had acted according to the strict letter of the aashto guidelines, without regard to the other relevant factors. These findings are not clearly erroneous.
Finally, plaintiff seeks to revive her intentional nuisance claim. Plaintiff argues that "defendant’s conduct was intentional in that it intended to build the guardrail where and as it did”, and defendant "knew or should have known what would eventually occur”.
A nuisance is predicated upon the existence of a dangerous condition. Rosario v City of Lansing, 403 Mich 124, 132; 268 NW2d 230 (1978) (opinion of Fitzgerald, J.). A nuisance in fact becomes a nuisance "by reason of circumstances and surroundings, and an act may be found to be a nuisance as a matter of fact where the natural tendency of the act is to create danger and inflict injury on person or property”. Bluemer v Saginaw Central Oil & Gas Service, Inc, 356 Mich 399, 411; 97 NW2d 90 (1959).
Although no clear majority view emerged from the Supreme Court on when governmental immunity bars a nuisance claim in Rosario, supra, and its companion case, Gerzeski v Dep’t of State Highways, 403 Mich 149; 268 NW2d 525 (1978), a majority of the justices agreed that a claim of intentional nuisance in fact was not barred. Court of Appeals cases decided after Rosario and Gerze*701ski have held that nuisances in fact must be intentional to avoid immunity. See Martin v Michigan, 129 Mich App 100, 109; 341 NW2d 239 (1983); Crosby v Detroit, 123 Mich App 213, 221-222; 333 NW2d 557 (1983); Ford v Detroit, 91 Mich App 333, 335-336; 283 NW2d 739 (1979). To find intentional nuisance, the evidence must show that "the governmental agency intended to bring about the conditions which are in fact found to be a nuisance”. Rosario, supra, p 142 (opinion of Moody, J.).
When a nuisance in fact is alleged, the trier of fact must first determine whether the condition or act creates a nuisance. If the trier of fact finds the existence of a nuisance in fact, it must then determine whether the nuisance was created intentionally. The plaintiff’s claim avoids governmental immunity only if the trier of fact finds both the nuisance and the intent. Rosario, supra, p 142.
In the present case, the trial court sitting as the trier of fact found that defendant had not created a nuisance in the construction or design of the guardrail, or by not placing barriers around the tree or down the side of the driveway. We conclude that the findings of fact by the trial court are not clearly erroneous. MCR 2.613(C). Moreover, we note that if defendant was not negligent in placing or designing the guardrail and defendant had no statutory duty to remove or guard the tree, as a matter of law a nuisance could not arise from these same facts. In light of our conclusion that there was no nuisnace, it is unnecessary to address whether the alleged nuisance was intentional. Furthermore, the Supreme Court did not address the issue of whether governmental immunity barred a nuisance claim in Ross v Consumers Power Co (On Rehearing), 420 Mich 567, 657; 363 NW2d 641 (1984) , and in light of our finding that there was *702no nuisance, we also find it unnecessary to address the issue.
Affirmed.
R. B. Burns, P.J., concurred.The Moerman panel reversed its original ruling on rehearing, but for reasons which had nothing to do with its approach to the scope of the agency’s duty. 141 Mich App 154; 366 NW2d 223 (1984). The panel adopted Judge Walsh’s dissent to its original opinion. Judge Walsh’s dissent contained nothing inconsistent with the rule we adopt herein. See, 129 Mich App 601. Ultimately, a judgment for the defendant road commission was affirmed. 141 Mich App 155.