Plaintiff was seriously injured on September 9, 1982, when the vehicle she was driving on M-55 in Manistee County went out of control and struck a tree. On February 1, 1983, plaintiff commenced this negligence action against defendant, alleging that it violated its statutory duty to maintain the road in reasonable repair and in a condition reasonably safe and fit for travel. MCL 691.1402; MSA 3.996(102). Plaintiff later sought, but was denied, leave to amend her *794pleadings to add a count of intentional nuisance.1 The trial court, sitting without a jury, found in favor of plaintiff and awarded her damages in the amount of $7,256,905.2 Defendant appeals as of right, challenging the trial court’s finding of liability and the amount of damages. Plaintiff cross-appeals from the award of damages.
i
All governmental agencies, state and local, remain statutorily liable for injuries arising out of the failure to maintain a highway in reasonable repair. Ross v Consumers Power Co (On Reh), 420 Mich 567, 591; 363 NW2d 641 (1984). MCL 691.1402; MSA 3.996(102) provides in pertinent part:
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 therefor, 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._
*795This statutory duty extends to the maintenance of conditions that affect the safety of motorists using the improved portion of the highway designed for vehicular travel. Moerman v Kalamazoo Co Road Comm, 129 Mich App 584, 592; 341 NW2d 829 (1983).
In the instant case, the trial court found defendant negligent for (1) allowing the tree to grow within close proximity to the highway and (2) allowing a two-to-five-inch drop-off between the surface of the road and the shoulder. The court further found that both the tree and the drop-off were dangerous conditions of which defendant had notice prior to the accidént.
On appeal, defendant challenges the trial court’s finding that it had notice of the drop-off and also challenges the court’s conclusion of law that defendant was negligent in not removing the tree. This Court will not set aside the trial court’s findings of fact unless they are clearly erroneous. MCR 2.613(C). A finding is clearly erroneous when, although there is evidence to support it, the reviewing court is left with a definite and firm conviction that a mistake has been made. Tuttle v Dep’t of State Highways, 397 Mich 44, 46; 243 NW2d 244 (1976).
No governmental agency is liable for injuries by virtue of MCL 691.402, unless it knew or should have known of the existence of the defect and had reasonable time to repair the defect before the injury took place. MCL 691.1403; MSA 3.996(103). Notice may be shown by: (1) actual notice; (2) existence of the defect for over thirty days, which establishes a conclusive presumption of notice; or (3) evidence showing that the agency should have discovered and repaired the defect in the exercise of reasonable diligence, i.e., constructive notice. Beamon v City of Highland Park, 85 Mich App *796242, 245; 271 NW2d 187 (1978), lv den 405 Mich 831 (1979).
In this case, there is no evidence that defendant had actual notice of the defect, nor was there testimony presented in relation to how long the defect had been present. Although Richard Blast, the supervising engineer of the Department of Transportation Safety Unit Programs, testified that it would take a minimum of two to three months for the edge of the road to erode two inches, this is not evidence that the two- to five-inch drop-off existed for thirty days. Thus, the trial court’s finding that defendant had notice of the defect cannot be allowed to stand unless we can say that defendant should have discovered and repaired the defect in the exercise of reasonable diligence. Beamon, supra. The trier of fact must have been presented with evidence from which it is reasonable to infer that defendant had constructive notice of the defect. Beamon, supra, pp 245-246.
Defendant argues that since there is no evidence that the drop-off existed prior to the day of the accident, it must have been created the same day by one of the many logging trucks which frequently travel the road. In this case, the cause of the drop-off is not determinative of defendant’s liability, but bears directly on the issue of notice. If defendant was correct that the drop-off was created the same day as plaintiff’s accident, we could not say that the defect was sufficiently longstanding to support a verdict of constructive notice. There is insufficient evidence, however, to support the theory that a logging truck created the drop-off on the day of the accident. A view of the scene immediately after the accident revealed no tire tracks from a logging truck, but, rather, only the tire marks from plaintiff’s vehicle. Defen*797dant’s theory is simply not reasonable in light of the evidence of other possible causes. There was testimony that the drop-off could have been caused by natural erosion combined with routine traffic. There was also testimony that a Manistee County Road Commission broom sweeper could have worsened an existing drop-off. Given the fact that the drop-off existed on the day of the accident, it is reasonable to infer that it had existed for some time.
There was testimony that the Manistee County Road Commission makes periodic observations of the road, specifically looking for drop-offs. These examinations took place at least on a weekly basis, sometimes several times a week or as often as once a day. Therefore, there was evidence from which the trier of fact could reasonably infer that defendant, in the exercise of reasonable diligence, should have discovered and repaired the defect. We cannot say that the trial court’s finding of notice is clearly erroneous.
Defendant also argues that the trial court’s conclusion that the presence of the tree rendered the highway defective is contrary to law. Relying on Moerman v Kalamazoo Co Road Comm, supra, and Carney v Dep’t of Transportation, 145 Mich App 690; 378 NW2d 574 (1985), lv den 424 Mich 889 (1986), defendant argues that it cannot be held liable for plaintiff’s injuries because the vehicle did not strike the tree without any of its wheels leaving the shoulder of the road.
The statutory duty to repair and maintain highways extends to the maintenance of conditions that affect the safety of motorists using the improved portion of the highway designed for vehicular travel. See Moerman, supra, p 592, and the cases cited therein. In Moerman, the plaintiff alleged that the statutory duty included removing a *798tree located near the shoulder of the road. Thus, the Court was called upon to determine whether the tree affected the safety of motorists using the shoulder of the road. The Court resolved the issue by adopting a "four-wheel” rule:
If the tree was positioned such that the average vehicle could have struck the tree without any of the vehicle’s wheels leaving the shoulder, the tree would affect the safety of motorists using the shoulder. Under such circumstances, the defendant’s duty to keep the road reasonably safe would extend to the maintenance of the tree.”[3] [Moerman, supra, p 593.]
In Carney v Dep’t of Transportation, supra, pp 696-697, another "tree case,” this Court followed the "four wheel” rule stating:
In this case, plaintiff’s 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 defendant’s failure to remove or guard the tree do not, in our view, constitute a viable claim under MCL 691.1402.
The Carney panel, however, went beyond the Moerman holding in finding no violation of the statutory duty:
Additionally, we have reviewed the photographic *799exhibits 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. [Carney, supra, p 697.]
We do not find Moerman and Carney controlling in this case. In neither case did the plaintiff allege that there was a defect in the road. In neither case did the plaintiff lose control of the vehicle by virtue of the governmental agency’s negligence. In this case, it was the defective road—the drop-off— which caused plaintiff to lose control of the vehicle and strike the tree. Defendant cannot be excused from liability, in this case, simply because less than all the wheels remained on the shoulder of the road. Defendant’s violation of its statutory duty to maintain the condition of the road set in motion the unfortunate series of events which resulted in plaintiff’s injuries. Liability is imposed not because of the proximity of the tree to the road, but because of defendant’s failure to repair the drop-off.
n
Defendant argues that the award of $4,161,000 in damages for pain and suffering is excessive. We disagree.
Awards for personal injury rest within the sound judgment of the trier of fact, particularly awards for pain and suffering, and there is no absolute standard by which to measure such awards. Precopio v Detroit, 415 Mich 457, 464-465; 330 NW2d 802 (1982). Since this case was tried without a jury, the clearly erroneous standard set forth in the court rules is applied to the amount of damages. MCR 2.613(C).
This Court will substitute its own appraisal of *800the record when, even though some evidence supports a finding of fact, a review of the whole record leaves the Court with a definite and firm conviction that a mistake has been made. Precopio, supra, pp 465-466; Tuttle v Dep’t of State Highways, 397 Mich 44; 243 NW2d 244 (1976). "[S]ince no trier of fact can value pain and suffering with mathematical certainty, a reviewing court must offer 'something more tangible than a difference of opinion as to amount’ before it sets aside a non-jury award as clearly erroneous.” Precopio, supra, pp 470-471, citing Fishleigh v Detroit United Railway, 205 Mich 145, 167-168; 171 NW 549, 556 (1919).
In awarding damages the trial court stated:
At the time of the accident Linda Peterson was a healthy, active mother of one child, Thirty-One (31) years old, and had no physical infirmities, and enjoyed a very active outdoor life as well as the usual indoor activities. She maintained a home and did the usual things but she also hunted, fished, panned gold in Alaska, and was an active outdoor woman. As a result of the defendant’s negligence and this automobile accident, she is admittedly a quadriplegic and has been since September the 9th, 1982, and she will be for the rest of her life. She has a life expectancy of Thirty-Eight (38) years from the date of the trial and this is admitted to be a permanent thing. There is no evidence to indicate she will not live the full measure of her life as determined by her life expectancy and therefore, the Court is obligated to find that she will live the life determined by the mortality tables of the State and the Court so finds.
* * *
Besides the usual.pain and suffering which the plaintiff has been obligated to endure as a result of the accident, the plaintiff will likewise be obligated *801to depend on people for the rest of her life. The embarrassment and mortification and humiliation that she must go through to bring other persons into the most private aspect of her life are beyond things that healthy people normally could determine. The loss of enjoyment and the good life that she would have enjoyed, besides the humiliation and mortification for the next 38 years, places upon the Court an obligation to fix damages for which there are no definite standards. No one would change positions with the plaintiff for any sum of money but the mere fact that damages are hard to assess does not relieve the Court from the duty to assess in those cases where damages are hard to determine. The Court feels that a fair award for the non-economic damages which the plaintiff will suffer for pain and suffering, loss of the good life, and the mortification and humiliation that she must endure from the date of the accident for the rest of her life expectancy is worth Three Hundred Dollars ($300.00) a day. If one multiplies Three Hundred Dollars ($300.00) a day for the three hundred sixty-five (365) days a year, they have a yearly damage of One Hundred Nine Thousand, Five Hundred Dollars ($109,500.00). This seems like a small sum to pay for damages when many peoples’ employment pays them many times that figure. However, the Court feels Three Hundred Dollars ($300.00) per day to be reasonable and fair and the Court so finds. Three Hundred Dollars ($300.00) a day multiplied by thirty-eight (38) years of the plaintiff’s life expectancy totals the sum of Four Million, One Hundred Sixty-One Thousand Dollars ($4,161,000.00) and the Court so awards those damages for the non-economic damage loss in this case.
Evidence of plaintiffs pain and suffering is provided through the testimony of plaintiff and Dr. Charles J. Danek. Needless to say, plaintiffs injuries greatly affect her day-to-day living. She is unable to attend to her needs and is completely *802dependent upon nurses for her feeding and cleansing and to move her about. In plaintiffs own words, it is like being "a prisoner in your own body.” Plaintiffs pain and suffering is not purely emotional. Even though her neck was broken and she is unable to feel or move her arms and legs, she experiences pain in the form of a burning sensation which is not relieved by medication. In light of the pain and suffering plaintiff has endured and will continue to endure throughout her lifetime, we conclude that the award for pain and suffering is in accordance with the evidence.
hi
The final issue on appeal in Docket No. 82957 is raised in plaintiff’s cross-appeal. Plaintiff argues that the trial court erred by reducing the award for loss of earning capacity by the amount of income tax plaintiff would have paid. We agree, for the reasons stated in Gorelick v Dep’t of Highways, 127 Mich App 324, 341-343; 339 NW2d 635 (1983). See also Dinger v Dep’t of Natural Resources, 147 Mich App 164, 179; 383 NW2d 606 (1985).
We reject defendant’s claim that there was no evidence adduced at trial upon which an award for loss of earning capacity could be based. The post-trial briefs submitted in lieu of closing arguments reveal that the parties stipulated that plaintiff’s wage loss was $4.54 per hour, or $181.60 per week, $9,443.20 per year, and $363,657.63 per lifetime.
Although we cannot determine whether the award of $249,315 was for lost wages or loss of earning capacity, damages for both are recoverable. Nawrocki v Hawkeye Security Ins Co, 83 Mich App 135, 140; 268 NW2d 317 (1978), lv den 406 Mich 896 (1979). Both items of damages are *803dependent upon proof of actual lost wages. Rohm v Stroud, 386 Mich 693, 696; 194 NW2d 307 (1972). The stipulation as to plaintiffs hourly wage prior to the accident, together with the severity and permanency of plaintiffs injuries, is evidence from which the trier of fact could have estimated plaintiff’s lost wages or lost earning capacity in a manner which went beyond mere conjecture. Gagnon v Dresser Industries Corp, 130 Mich App 452, 461; 344 NW2d 582 (1983), aff'd 424 Mich 166 (1985).
This case must be remanded to the trial court for computation of plaintiffs lost wages and/or loss of earning capacity without deduction for prospective income taxes.
iv
The sole issue raised in plaintiffs second appeal (Docket No. 78840) is whether the trial court erred in denying plaintiffs motion to amend her complaint to add a count of intentional nuisance. Pursuant to plaintiffs statement to the Court at oral argument, this issue is now waived as plaintiff has prevailed on her claim for negligence.
Reversed and remanded for entry of judgment in favor of plaintiff in accordance with Part in of this opinion.
T. M. Burns, J., concurred.On July 30, 1984, this Court granted plaintiffs application for leave to appeal the denial of her motion to amend her complaint (Docket No. 78840). By order of this Court, that appeal has been consolidated with the instant appeal.
The award of damages consisted of: $2,500,000 for nursing costs, $346,950 for medical damages, $249,315 for loss of wages/lost earning capacity, and $4,161,000 for noneconomic damages.
Although the Moerman panel reversed its original ruling on rehearing, its reasons for doing so had nothing to do with its approach to the scope of the defendant’s duty. 141 Mich App 154; 366 NW2d 223 (1984), lv den 422 Mich 979 (1985).