[EDITORS' NOTE: THIS PAGE CONTAINS HEADNOTES. HEADNOTES ARE NOT AN OFFICIAL PRODUCT OF THE COURT, THEREFORE THEY ARE NOT DISPLAYED.] *Page 438 Plaintiff appeals from a judgment in defendants' favor in an action brought to recover damages on account of injuries sustained by plaintiff's automobile, which was struck by a truck owned by defendant T.I. Butler Company and operated by defendant Norman MacIntosh.
Plaintiff's cause of action was based upon an allegation charging that at the time the accident happened the truck was being negligently and carelessly controlled, driven, and operated, which allegation was denied in the answer. The cause was tried on that issue, the trial court finding thereon in defendants' favor. There appears to be little if any conflict in the evidence regarding the manner in which the collision occurred, the principal question presented for determination being whether the conclusion reached by the trial court to the effect that the truck was not negligently operated is fairly supported by the undisputed facts.
Early in the afternoon on the day of the accident plaintiff parked his automobile along the curb on the right-hand side of Powell Street, between Bush and Pine Streets, San Francisco, leaving it there while he attended a theater. The ascent in the grade on Powell Street between the two intersecting streets mentioned is about twenty-three percent, *Page 439 and up the center of the street run the double tracks of a cable-car line. A black streak of oil or grease eighteen inches or two feet wide had been accumulating for some time on the brick pavement close to the curb, on the right-hand side of Powell Street, for the entire distance of the block, as a result of oil dripping from motor vehicles which had been driven up the hill and from those parked along the curb. This condition of the pavement was similar to that existing on many other hills in San Francisco, according to the testimony. On the day mentioned MacIntosh, the truck driver, had been hauling gravel with a five-ton Kleiber truck up the Powell Street hill to a construction job on Pine Street, between Powell and Mason Streets. Shortly after 4 o'clock in the afternoon he started to ascend the Powell Street hill on his third trip, his truck being loaded with five tons of gravel. As he entered Powell Street at Bush and proceeded toward Pine, his truck was traveling in the "low-low" gear at a rate of speed not exceeding five miles an hour, "straddling" the outer rail of the right-hand cable-car track. When he was nearly opposite plaintiff's parked automobile a cable car approached from the rear, sounding the gong, and in order to give it clearance, MacIntosh, having then passed plaintiff's automobile, which was the last one parked on that side of the street, pulled away from the cable car tracks to the right. As he reached a spot near the curb, the right rear wheel of the truck rolled into a spot of oil or grease on the pavement, causing the rear wheels to lose traction. The truck then started to slide backward, "bursting out" the clutch, and despite the efforts of MacIntosh to control its movements by the application of the brakes, continued its backward course slowly down the hill. Meanwhile MacIntosh, seeking to check its movement, tried to make it "jump" the curb and to back it into a telephone pole, but was unable to do so, and it proceeded backward until it jammed into plaintiff's automobile, damaging the front end thereof and the motor. After the impact the wheels of the truck gained traction and the truck proceeded up the hill. The collision occurred about sixty or seventy feet from the Pine Street intersection with Powell Street. *Page 440 [1] Appellant contends that considering the weight of the load the truck was carrying and the grade of the street in that block, the driver failed to use due caution and circumspection, as is required by section 121 of the Motor Vehicle Act (Stats. 1923, p. 557), in turning on to a pavement which he knew was more or less spotted with grease, and that consequently he stands charged as a matter of law with negligence, citing in support of this contention the case of Raymond v. Sauk County,167 Wis. 125 [L.R.A. 1918F, 425, 166 N.W. 29]. The principle of the case cited is not in point here, however, because the facts there showed that the driver knew that the highway on to which he was about to drive his automobile had just received a fresh application of tar and oil, and the court therefore held that common knowledge should have dictated that it was in a slippery and dangerous condition. The evidence here shows that at the time the accident happened there was no moisture on the street, the weather was clear and the condition of the pavement on the right half of the street was no different in appearance from that of many other hilly streets in the city over which motor vehicles of all kinds passed daily. Section 122 of the Motor Vehicle Act (Stats. 1923, p. 557) requires that "on all occasions, the driver of a vehicle shall drive the same upon the right half of a public highway and close to the right-hand edge or curb of such highway unless it is impracticable to travel on such side of the highway . . ." The right half of the street beyond the point where plaintiff's automobile was parked was unobstructed and, therefore, in pulling away from the street-car tracks and over toward the curb on the right-hand side of the street the driver of this truck was doubtless obeying the provisions of the law above quoted, but in doing so came in contact with a spot of oil recently deposited, as the proof indicates, which could not be readily detected in the black streak while traveling up the hill, and it resulted in placing the truck temporarily beyond the control of its own mechanism. In any event, the question of whether or not it should have appeared to the truck driver as a reasonably prudent man that it was impracticable to travel on the right half of the street was one of fact to be determined by the trial court from all the circumstances then *Page 441 before it, and we are unable to declare as a matter of law from the mere fact of the discoloration of the pavement with oil that the trial court's conclusion on this issue was erroneous.
[2] Appellant furthermore contends, upon the assumption that the presence of the black streak of oil on the right-hand side of the street made it impracticable to travel on that side, that if it were necessary for the truck driver to divert his course at all, in order to let the cable car pass, he should have turned on to the left side of the street, and in furtherance of this theory sought to show on cross-examination of the truck driver the condition of the pavement on the left side of the street; but the trial court excluded the testimony, and the ruling is assigned as error. We find no merit in the point, because, as already shown, the evidence failed to establish that it was impracticable to travel on the right half of the street, and, therefore, the question of the condition of the left half thereof became immaterial. As was said by the trial court when making the ruling complained of, the law required the driver, under the circumstances present, to use the right side of the street, and hence he could not be deemed guilty of negligence for not using the left side thereof.
[3] We find no error in the trial court's rulings sustaining respondents' objections to certain hypothetical questions propounded to appellant's expert witness. One of the questions asked was: "If the brakes on a truck are in proper condition, and the brakes are properly applied, even going up a hill, will the truck slide back?" Another was, after particularizing the Powell Street hill with which the witness said he was familiar, "State whether or not if the brakes of a truck going up that hill, a five-ton truck carrying approximately a five-ton load, are properly applied, whether or not the proper application of the brakes would stop the truck." It will be noted that the very element which was shown by the testimony of all witnesses to the accident, including that of a traffic officer, to have been the sole contributing cause of the backward movement of the truck, namely, the greasy condition of the pavement, was wholly omitted from both questions. If, therefore, appellant was seeking to prove that the accident could have been averted by the proper application of effective *Page 442 brakes, the substance of the questions asked was foreign to the situation described by the undisputed evidence in the case.
[4] But, assuming that such hypothetical questions had included the essential element mentioned, they would still have been objectionable, for the reason that the question of what the effect would be of locking the wheels on a loaded five-ton truck sliding backward down hill on a twenty-three per cent brick-paved grade spotted with an unknown quantity of grease obviously would be problematical and could not be determined from like experiences or as a result of professional research, which is substantially the basis of expert testimony.
There was no question involved here as to the distance in which a motor vehicle might be stopped under ordinary road conditions, by the proper application of effective brakes, as was presented in Berkovitz v. American River Gravel Co., 191 Cal. 195 [215 P. 675]; nor does the question arise as to whether the driver negligently omitted to do something which a prudent person would have done in handling the truck after the emergency arose, which was the issue in the case of Alameda County v. Tieslau,44 Cal.App. 332 [186 P. 398], for the only evidence given on this point was that the brakes were fully and effectively applied as soon as the wheels lost traction in the grease. The rules of the cases cited upon which appellant relies are, therefore, not controlling here.
[5] MacIntosh testified that when the wheels of the truck first lost traction and the clutch "burst out" he fully applied the brakes and that they were in good working order, but that the application of the brakes did not prevent the retrograde movement of the truck; that thereafter it continued to slide, the rear wheels at times revolving slowly backward. In this connection the third hypothetical question objected to was: "If the brakes of a large truck are in good working condition and those brakes are applied, will the wheels of that truck revolve?" Plaintiff did not plead the matter of defective brakes as an element of negligence, but assuming that under the general issue the trial court might well have allowed the question to be answered, a negative reply thereto would not necessarily have been in conflict with the testimony given by MacIntosh *Page 443 that the brakes were fully applied and that they were effective, for he further testified that in his endeavor to avoid striking appellant's automobile with the truck during its retrograde movement, he tried to make it mount the curb and rest against a telephone pole, from which testimony the inference may be fairly drawn that he may have momentarily released the pressure on the brakes and thus allowed the rear wheels to revolve backward in his effort to steer the truck into and over the curb.
Appellant urges additional points relating to the sufficiency of the evidence supporting a finding of the trial court that appellant's loss was covered by a policy of indemnity insurance and that the damaged automobile had been repaired by the insurance carrier and not by plaintiff; also that, regardless of the cost of the repairs, appellant was entitled to damages for the loss of the use of the automobile; but in view of our conclusion that the trial court's finding to the effect that respondents were not negligent is fairly sustained by the evidence, we deem it unnecessary to inquire into the additional points mentioned.
The judgment is affirmed.
Tyler, P.J., and Cashin, J., concurred.