Plaintiff appeals as of right from the trial court’s grant of defendant’s motion for summary judgment. The litigation arose after a tragic automobile accident which took the lives of *628two young people. Plaintiff maintains that defendant’s negligent maintenance of the highway where the accident occurred caused the accident. Defendant maintains that the state was responsible for any liability arising out of the maintenance of said highway and that furthermore the county was expressly excused by statute, MCLA 250.61; MSA 9.901.
The underlying facts are undisputed. On January 3, 1971 two young people, brother and sister, were killed in an automobile accident on M-131, just east of Harbor Springs. On that date, the defendant, Emmet County Road Commission, was by contract with the State of Michigan, maintaining the road in question. Plaintiff contends that during a snow storm which covered the roadway with snow, the automobile driven by Linda Robinson struck a chuck hole causing the car to go out of control and into the oncoming lane where it was struck by another vehicle.
The procedural background in the instant case is crucial and will be recited in detail. On July 27, 1971 the plaintiff (mother) in her capacity as administratrix of the two children’s estates filed this lawsuit. On August 10, 1971 defendant appeared, answered the complaint, and brought a motion for summary judgment on the basis that the defect was off the traveled portion of the highway and therefore the county had no duty to keep it in proper repair. This motion was denied.1 In its answer, defendant reserved the right to file affirmative defenses. On March 21, 1972 defendant did file an affirmative defense, the contributory negligence of the deceased.
The case proceeded to discovery with interroga*629tories submitted by both sides. One deposition was taken and finally on August 11, 1972 a pretrial conference was held.2 Both sides declared their satisfaction with the pleadings and their readiness for trial. However, on October 5, 1972 defendant filed another motion for summary judgment, on the basis that plaintiff had failed to state a claim upon which relief can be granted. GCR 1963, 117.1, 117.2(1). The motion indicated that it was based on MCLA 250.61; MSA 9.901. No affidavit was attached indicating precisely what defense was relied on, and accordingly the motion was denied. On January 9, 1973 the motion was again filed with the proper affidavit setting forth the claim that the highway in question was a state trunkline highway and that by virtue of MCLA 250.61; MSA 9.901, the county road commission had no responsibility therefor. On January 9, 1973 the statute of limitations had already run against the State of Michigan, MCLA 691.1411(2); MSA 3.996(111)(2). On September 30, 1974 a new trial judge, who had succeeded the original judge who had resigned, denied the defendant’s motion on the basis that it did not conform with the court rule. A third motion on the issue was then filed on November 21, 1974, with a new affidavit, and that motion was argued by counsel and granted by the trial court on March 6, 1975.
Plaintiff should have brought an action against the state for improper maintenance of the highway in question. MCLA 691.1402; MSA 3.996(102), provides in relevant part as follows:
"Each governmental agency having jurisdiction over any highway shall maintain the highway in reasonable repair so that it is reasonably safe and convenient for *630public 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 problem of "jurisdiction” over state trunkline highways is clarified in Const 1963, art 5, § 28, which states:
"There is hereby established a state highway commission, which shall administer the state highway department and have jurisdiction and control over all state trunkline highways and appurtenant facilities, and such other public works of the state, as provided by law.”
The final act which provides for recovery against the state is MCLA 250.61; MSA 9.901, which provides in part:
"On and after January 1, 1960, the cost of constructing, improving and maintaining trunk line highways shall be met entirely by the state, and the counties, townships and incorporated cities and villages shall thereafter be relieved of all expenses and legal liabilities in connection therewith.”
Although plaintiff does attempt to argue as to the nature of the highway in question, the trial court found it was a state trunkline highway. There has been no showing of any reason to upset this finding and we decline to do so.
Plaintiff could have maintained an action against the state. Instead, plaintiff brought this action against the county who had contracted to maintain the highway. MCLA 250.61; MSA 9.901 appears to relieve the county of all legal obligations and liabilities with respect to maintenance of *631this state trunkline highway. See Bennett v City of Lansing, 52 Mich App 289; 217 NW2d 54 (1974), Moyer v Wayne County Road Commission, 52 Mich App 285; 217 NW2d 53 (1974). These decisions interpreting this statute are somewhat troubling. A county is apparently free to contract with the state in order to perform the state’s obligations and at the same time to be free of liability for its negligent acts. This removes the county from any requirement of accounting to those injured by its negligent acts while undergoing a contracted-for operation. However, our Court has held the county is, by statute, excused from any liability.
"It would not, therefore, seem logical that the Legislature would relieve all counties of legal liabilities for maintaining trunkline highways in one section of a statute, MCLA 250.61; MSA 9.901, supra, and then in the very next section, MCLA 250.62; MSA 9.902, supra, give the State Highway Commission the power to contract with the county for the maintenance of the trunk-line highway without intending that the county would not be liable for negligent maintenance.
"We hold that the State Highway Commission does not divest itself of jurisdiction over state trunkline highways by the maintenance agreements involved. Therefore, possible negligent acts of other governmental units in maintaining state trunkline highways will not render such units liable.” (Footnote omitted.) Moyer, supra, at 287-288; 217 NW2d at 54.
In another decision decided the same day, our Court explained the apparent rationale:
"This, of course, does not leave plaintiffs without a remedy, since they can continue their action against the proper defendant, the State Highway Department. While at first blush it seems odd that the state must answer for the omission of a local unit of government, it must be remembered that if local units of govern*632ment were not absolved of liability with respect to maintenance of state trunkline highways, local units of government would be less willing to undertake the responsibility of said maintenance on behalf of the state.” Bennett, supra, at 295-296; 217 NW2d at 58.
Bennett is particularly applicable since, as here, the case was argued on the basis of governmental immunity. The Court explained the nature of the cause of action as follows:
"By constitutional mandate the State Highway Commission was given 'jurisdiction and control over all state trunkline highways’. We perceive that the term jurisdiction as used in the statute must logically be read to be coextensive with the same term used in Const. 1963, art 5, § 28. Therefore, the state trunkline highways here in question are within the jurisdiction of the State Highway Department and not the municipal corporation. It has been held that the provisions of 1964 PA 170 must be strictly construed. Johnson v Michigan, 32 Mich App 37; 188 NW2d 33 (1971). Given that rule of construction, since the highways were not within the jurisdiction of the defendant municipal corporation, the § 2 exception does not apply, thus the § 7 governmental immunity is available.” Bennett, supra, at 294-295; 217 NW2d at 57-58.
In Bennett the action was brought against the City of Lansing. The Court concluded that since the highways were not within the jurisdiction of the defendant municipal corporation, the §2 (MCLA 619.1402; MSA 3.996[102]), exception did not apply, and therefore governmental immunity, by virtue of § 7 (MCLA 691.1407; MSA 3.996[107]), was available to the city as a defense. ,
A compelling argument can be made that the statute merely grants immunity to the county for its failure to act. That is, the county has no duty to maintain state trunkline highways. However, it *633can be argued that once the county by contract has undertaken to maintain the roads, in spite of its statutory protection, a new duty is then created which obligates the county to act with due care. See Prosser, Torts (4th ed), § 56, pp 338-350 (3d ed, § 54, pp 334-346). This argument has been rejected in Michigan. Bennett, supra, Moyer, supra. We do recognize, however, that this argument has particular force when the undertaking is coupled with a contractual obligation to maintain the roads in return for a bargained-for benefit. The receipt of consideration to undertake this task while at the same time the county is excused from all liability is somewhat disturbing. Nevertheless, the Legislature has provided that the plaintiffs remedy is an action against the state. MCLA 250.61; MSA 9.901.
Plaintiff also maintains that the county is, in reality, an independent contractor. This same argument was made many years ago and rejected. Johnson v Board of County Road Commissioners of Ontonagon County, 253 Mich 465; 235 NW 221 (1931). The Court held that a municipal corporation does not lose its immunity from liability merely because it derived an income therefrom, so long as the income was only incidental to the main purpose of functioning as a government agency. The Court did note that a municipality may be held to respond, in damages for a negligent act in furtherance of a voluntary activity undertaken for its own profit and commercial in character. 253 Mich at 471; 235 NW at 223. The Court held that maintenance of a highway was not such an act. The Court concluded:
"We find nothing in this record indicating that defendant was engaged in an enterprise which inured especially to its own corporate benefit. Instead, all of its activities had to do with the construction or mainte*634nance of the public highways, which is the performance of a public duty. * * *
"We are unable to find any fact or circumstance in this record which distinguishes it from the Gunther Case [Gunther v Board of County Road Commissioners of Cheboygan County, 225 Mich 619; 196 NW 386 (1923)] wherein it was held that a board of county road commissioners in performing maintenance work on a trunk line highway was performing a governmental function and that therefore the defendant board was not 'liable for injuries caused by the negligent operation of a truck by one of its agents, in the absence of a statute creating such liability.’ ” Johnson, supra, at 471, 472; 235 NW at 223, 224.
While there may be circumstances where the profit motive and character of maintenance of a highway might indicate that the undertaking was outside the protection of governmental immunity, this is not such a case. Plaintiff has failed to allege such circumstances which would illustrate the existence of a proprietary function in the instant case, in light of the principles announced years ago in Johnson. Although we are somewhat unhappy with any situation which results in a defendant’s excusal from all liability for its negligent acts, particularly where the acts occurred during the performance of services under a contract for consideration, this Court cannot change this longstanding law.
Therefore, we are reluctantly constrained to find that the defendant herein had a valid defense. However, this defense was provided for by statute. Therefore, we must determine if it was properly asserted.
In the instant case, we must decide whether defendant, relying on MCLA 250.61; MSA 9.901, properly raised this statute by its motion for sum*635mary judgment. GCR 1963, 117.2(1). Plaintiff contends that a motion for accelerated judgment, GCR 1963, 116, was the proper method to raise this issue.
Our first inclination is to rely on Moyer, supra, and Bennett, supra, to determine what the proper procedural avenue is in the instant case. However, in Moyer the Court affirmed the defendant’s motion for accelerated judgment, whereas in Bennett the Court affirmed the grant of summary judgment. Also, in both cases, this issue was not discussed by the Court. Therefore, we must decide on our own what the proper basis for a motion is under these circumstances.
The trial court granted defendant’s motion for summary judgment, apparently on the basis of GCR 1963, 117.2(1).3 Plaintiff maintains that because MCLA 250.61; MSA 9.901, is essentially an immunity provision, Popielarski v City of Warren, 380 Mich 651; 158 NW2d 491 (1968), it must be raised by a motion for accelerated judgment under GCR 1963, 116.1(5).4 Defendant responds by denying the above and asserting that MCLA 250.61; MSA 9.901, is a provision which deletes the duty element of a negligence cause of action and therefore must be asserted pursuant to GCR 1963, 117.2(1). See, Pompey v General Motors Corp, 385 Mich 537; 189 NW2d 243 (1971).
The defense of governmental immunity is embodied in 1964 PA 170, MCLA 691.1401, et seq *636MSA 3.996(101), et seq.5 When this act was enacted, it repealed many of the underlying provisions formerly contained in MCLA 250.61; MSA 9.901. However, it did not repeal 1909 PA 283, chapter 4, § 21, nor did it specifically repeal MCLA 250.61; MSA 9.901. Had the Legislature intended to renounce the continuing validity of this act, it could have done so. Clearly this act remains as part of the governmental immunity of this state.
The defense of governmental immunity is one which must be raised by a motion for accelerated judgment, under GCR 1963, 116.1(5), because it represents a special disability which avoids an otherwise valid cause of action. See Lockaby v Wayne County, 63 Mich App 185; 234 NW2d 444 (1975), Bloss v Williams, 15 Mich App 228; 166 NW2d 520 (1968). The two rules have been distinguished.
"The motion for accelerated judgment under Rule 116 is distinguished from the motion for summary judgment under Rule 117 by several features. Primarily the motion for summary judgment contemplates a ruling on the merits in situations where there are no disputed issues of fact, whereas a motion for accelerated judgment under Rule 116 tests certain special defenses which may dispose of the case and, therefore, should be heard preliminarily to determine whether a trial on the merits will be necessary, even though factual issues may have to be resolved in order to rule upon the *637motion.”6 1 Honigman & Hawkins, Michigan Court Rules Annotated (2d ed), p 336.
It is clear there was an underlying dispute, an otherwise viable claim, which formed the basis for this action. However, the Legislature provided for a special defense for the county, imposing liability only on the state. Therefore, this is a "defense” which is properly raised by a motion for accelerated judgment. See, Buddy v Department of Natural Resources, 59 Mich App 598; 229 NW2d 865 (1975).
An incorrectly labeled motion is considered as if correctly labeled, absent prejudice to the other party. Birch Run Nursery v Jemal, 52 Mich App 23; 216 NW2d 488 (1974), modified 393 Mich 775; 224 NW2d 282 (1974). Conversely, if treating the motion as something other than what it purports to be would cause prejudice it must be treated as labeled. Therefore, if there is prejudice we must treat this as error demanding reversal. Since the statute of limitations, MCLA 691.1411(2); MSA 3.996(111)(2), has run against the state we find sufficient prejudice to warrant reversal.
We find that the proper motion to raise this statutory defense was GCR 1963, 116.1(5). A motion for accelerated judgment under this court rule tests certain special defenses which may dispose of the case and should be heard preliminarily to *638determine whether a trial on the merits will be necessary, even though factual issues may have to be resolved in order to rule on the motion.7 A motion for accelerated judgment provides a method by which certain disputed issues can be adjudicated at an early stage with a possibility of ending the case and avoiding an expensive trial.8 Rule 117, on the other hand, is a device designed to find whether or not there exists any dispute as to law or fact. 1 Honigman & Hawkins, Michigan Court Rules Annotated, p 353. Obviously the time factor under a Rule 117 motion is not crucial since an ultimate finding by the court will show that there was no underlying valid cause of action. An accelerated judgment, however, is based on a special defense and, in essence, results in an early adjudication. Prompt resolution of this motion, and a corresponding saving of time and effort, is the underlying purpose for the existence of this motion.
The rule has been construed as having been designed to secure just, speedy, and inexpensive determination of various issues. Manufacturers Construction Co v Covenant Investment Co, 43 Mich App 123; 204 NW2d 54 (1972), lv den, 388 Mich 810 (1972). See also Great Lakes Restaurants, Inc v Rumery Construction Co, Inc, 23 Mich App 501; 179 NW2d 36 (1970). Obviously, had defendant complied with the spirit of the rules and made a proper and prompt motion for accelerated *639judgment pursuant to GCR 1963, 116, plaintiff could have filed a proper action against the state. Plaintiffs action was filed in July of 1971. In August 1971 defendant answered and brought a motion for summary judgment on the basis that the defect was not on the road itself and, therefore, the county had no duty to repair. In March of 1972 defendant filed an affirmative defense, contributory negligence. The parties continued to prepare for trial taking interrogatories and depositions and holding a pretrial conference. Defendant did not move for summary judgment on the basis of MCLA 250.61; MSA 9.901, until October of 1972. By the time this motion was properly filed with supporting affidavits, the statute of limitations against the state had run.
Because this case will be remanded, we deem it necessary to discuss the waiver question raised by our holding that this statutory shifting of liability is a special defense which must be raised by a motion for accelerated judgment pursuant to GCR 1963, 116. It has long been the rule in Michigan that affirmative defenses must be pled specially. Wachsmuth v Merchants National Bank, 96 Mich 426; 56 NW 9 (1893).9 This rule has been carried over in the present court rules, GCR 1963, 111.3. The rationale has been aptly stated in 61 Am Jur 2d, Pleading, § 152, p 580:
"Since the plaintiff must apprise the defendant in the beginning as to what he relies upon for a recovery, it is only right that the defendant should be required also to inform the plaintiff of any special or affirmative defenses he expects to make by pleading the facts constituting such defenses.”
*640As we said earlier, a motion for accelerated judgment is designed to provide a method by which certain disputed facts raising the special defense can be adjudicated prior to trial to allow prompt resolution of the dispute. An affirmative defense is one that concedes that the plaintiff once had a cause of action but such action no longer exists. 61 Am Jur 2d, supra.
In Manufacturers Construction Co, supra, the disputed defense was lack of capacity to sue based upon plaintiff’s failure to file an annual report and pay franchise fees pursuant to MCLA 450.87; MSA 21.87. There, the Court held that this was a special defense which was subject to waiver. The Court did hold that GCR 1963, 111, must be compared with the provisions of GCR 1963, 118, allowing amendment of pleadings by leave of the court. The Court held that these rules were interrelated and allowed amendment to cure what would be a waiver. See also Zenith Radio Corp v Hazeltine Research, Inc, 401 US 321; 91 S Ct 795; 28 L Ed 2d 77 (1971), reh den, 401 US 1015; 91 S Ct 1247; 28 L Ed 2d 552 (1971), which similarly construed the Federal rules to allow an amendment to cure a waiver of a defense. The acceptance or rejection of a proposed amendment falls within the trial court’s discretion. Manufacturers Construction Co, supra.
It is clear in the instant case that without this statute the county road commission which contracted to repair the road would have been liable for its negligent acts which proximately caused injury to someone using that road. In addition, in Michigan had the road been under the jurisdiction of the county, and not the state, the county would have been liable for its negligent acts which proximately caused injury to a foreseeable plaintiff. See Mullins v Wayne County, 16 Mich App 365; 168 *641NW2d 246 (1969), lv den, 382 Mich 791 (1969), Weckler v Berrien County Road Commission, 55 Mich App 7; 222 NW2d 9 (1974). We rule it was incumbent upon the defendant in the instant case to properly raise such a defense by pleading both the appropriate statute and the facts which indicated that the statute was applicable as a special defense which prevented recovery against this defendant. Failure to plead such facts could be a waiver pursuant to GCR 1963, 111.3.
The nature of the road involved in this dispute was a question of fact. MCLA 247.651, et seq.; MSA 9.1097(1), et seq., does establish the state trunkline highway system under the control of the state highway commission. Nevertheless, this act does provide for revision of such classifications and for additions to and deletions from the various classifications involved in a state trunkline highway system. One thing the statute makes clear is that the nature of a road may change through the course of time. A question of fact is involved and the proof of that fact is essential to the county’s defense. Merely because such fact may be subject to proof by judicial notice10 does not change the *642basic proposition that this is indeed a fact question. Failure of defendant to raise this fact will be fatal to this defense and could result in a finding of liability as to the county. Furthermore, there are sufficient elements of estoppel in the instant case to guide the trial court in its decision as to a denial of an amendment of the pleadings, GCR 1963, 118. In the instant case, defendant failed to raise this defense properly for approximately two years. In addition, defendant had earlier brought a motion for summary judgment based on lack of duty to maintain the shoulder of the road in question, and had filed an answer and later an affirmative defense of contributory negligence. In its earlier motion for summary judgment, the defendant even misled the plaintiff further by stating in his brief in support of a motion for summary judgment:
"(The alleged defect in this case is 3 inches. The Johnson case [Johnson v State of Michigan, 32 Mich App 37; 188 NW2d 33 (1971)] also involved a state trunkline, four lane divided highway, whereas the instant case involves what is essentially a local road, but which is also designated a state scenic route.)”
In the instant case, the county, by contracting to maintain the road in question, which was under the jurisdiction of the state, was in effect the agent of the state authorized to maintain the road. Its liability was excused by the special statute. Proof of facts by the defendant, showing that the highway in question was not under its jurisdiction by *643statute, placed liability on the state only. Failure to assert promptly such a defense, which in effect also excused the principal (the state) because of the running of the statute of limitations as against the state would estop the county from raising such a defense by amendment to its already filed answer. In a similar case, an Ohio court did find an estoppel. Smith v Brush-Moore Newspapers, Inc, 23 Ohio App 2d 16; 52 Ohio Ops 2d 9; 260 NE2d 622 (1970), aff'd 27 Ohio St 2d 111; 56 Ohio Ops 2d 62; 271 NE2d 846 (1971). See also Anno., Fraud, misrepresentation, or deception as estopping reliance on statute of limitations, 43 ALR3d 429. In Smith, the plaintiff brought a personal injury action against the defendant named as Brush-Moore Newspapers, Inc, doing business as WONE Radio Station. After the statute of limitations had run, Brush-Moore Newspapers, Inc. filed a motion for summary judgment based on the fact that it was not the proper party. The proper party was a corporation entitled WONE, Inc. The court found an estoppel in view of evidence that the two corporations had common directors, several common officers, the same attorney, the same insurance, and furthermore, evidence tended to indicate that plaintiff was misled by correspondence with the common insurer as to the separate identity of the parties. In that case, the court held that the proper defendant would be barred from asserting the statute of limitations. We feel that in the instant case the defendant should be barred from asserting in his answer facts which would entitle it to the protection of this special defense.
Summarizing briefly, we hold that according to statute, a county is excused from liability for the maintenance of a state trunkline highway. However, in the instant case, the defendant raised this *644statutory defense and the facts showing the nature of the highway improperly by summary judgment pursuant to GCR 1963, 117, instead of by a motion for accelerated judgment pursuant to GCR 1963, 116. The statutory defense requires proof that the road in question was, in fact, under the jurisdiction of the state and not the county. The defendant herein earlier appeared, answered, and moved for summary judgment and later raised an affirmative defense by way of amendment to his original answer. Finally, he raised this apparently otherwise applicable statutory defense improperly by a motion for summary judgment. Although ordinarily a court should freely allow amendment of an answer pursuant to GCR 1963, 118, so as to prevent waiver of defenses according to GCR 1963, 111, the allowance of the amendment is within the trial court’s discretion. On remand, the court should consider the fact that the defendant’s action had allowed the statute of limitations to run against the plaintiff in a claim against the state and the fact that the defendant, in his brief in support of a motion for summary judgment, indicated that this was a local road (and apparently under the jurisdiction of the county) which would certainly tend to mislead the plaintiff. Failure to properly raise this defense where circumstances existed which indicated plaintiff was prejudiced by defendant’s failure to properly and promptly raise such an issue warrants reversal of the trial court’s grant of the improper motion for summary judgment.
Reversed and remanded for proceedings not inconsistent with this opinion.
T. M. Burns, J., concurred.