This suit arose out of two separate accidents where a trailer — tractor collided with a cow on a public highway. The two cows were owned by Cross Claimant-Appellants. Plaintiffs sued the owners of the cows for negligence in failing to prevent their livestock from running on a fenced public highway and the Highway Department for failing to properly inspect and maintain the fence along the highway. The cattle owners cross-claimed against the Highway Department, asserting that any actionable negligence was imputable solely to the Highway Department whose statutory duty it was to maintain the fence. The trial court dismissed the complaint and cross-claim against the Highway Department on the grounds that the Department was immune from this suit under the New Mexico Tort Claims Act. We reverse.
The issue before us is whether the Tort Claims Act (§§ 41-4-1 to 41-4-25, N.M.S.A. 1978 and Supp.1979) grants sovereign immunity to the Highway Department for negligence in the construction or maintenance of fences along highways under its jurisdiction. We hold that the Act waives sovereign immunity for this type of suit.
Sovereign immunity in New Mexico is a statutory creation. In Hicks v. State, 88 N.M. 588, 544 P.2d 1153 (1975), the New Mexico Supreme Court abolished common law sovereign immunity. The Legislature responded by enacting the Tort Claims Act in 1976, reinstating governmental immunity except in eight classes of activity. Sections 41 — 4—4 to 41-4-12.
Appellants allege that the exception pertaining to liability for negligence in the maintenance of highways and streets applies to the case before us. That section reads in part:
*58A. The immunity granted pursuant to . .. [this Act] does not apply to liability for damages resulting from bodily injury, wrongful death or property damage caused by the negligence of public employees while acting within the scope of their duties in the maintenance of or for the existence of any bridge, culvert, highway, roadway, street, alley, sidewalk or parking area. (Emphasis added.)
Section 41-4-11, N.M.S.A.1978.
They argue that since the state Highway Department has a statutory obligation to construct, inspect and maintain fences along highways under its jurisdiction, § 30-8-13, N.M.S.A.19781 §'41-4-ll(A) of the Tort Claims Act simply removes the bar of sovereign immunity which would otherwise prevent suits against the Department for its failure to carry out a statutory mandate.
The Highway Department reasons that § 41-4-ll(A) does not confer liability for negligently maintained fences along state highways for two reasons: 1) because the statute does not specifically mention “fence”; and 2) because “fence” is not included in the usual meaning of “highway”, and, consequently, the idea of “fence” is not anywhere in this statute. We reject both arguments.
The first argument would force a narrow construction on the statute which is not consistent with the guidelines of our Supreme Court. The direction indicated by that court in interpreting the Tort Claims Act has been to ward, a liberal, rather than a narrow, construction of the Act. See, Holiday Management Co. v. City of Santa Fe, 94 N.M. 368, 610 P.2d 1197 (1980); City of Albuquerque v. Redding, 93 N.M. 757, 605 P.2d 1156 (1980).
The second argument concentrates on the meaning of “highway” rather than on the meaning of “maintenance of a highway”. While it is certainly true that, in ordinary usage, “fence” is not embraced in the meaning of “highway”, it is not necessarily true that maintaining a highway does not include maintaining the fence alongside it.
Maintenance of a road or highway involves more than simply keeping the road surface in good repair. Lynes v. St. Joseph County Road Commission, 29 Mich.App. 51, 185 N.W.2d 111 (1970); see, Miller v. County of Oakland, 43 Mich.App. 215, 204 N.W.2d 141 (1972); see also, Baker v. Ives, 162 Conn. 295, 294 A.2d 290 (1972). In Michigan, as in New Mexico, the statutory scheme generally confers immunity on governmental bodies, but waives it in certain instances, including improperly maintained highways. The pertinent Michigan statute states explicitly, “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. * * *” (Emphasis added.) Mich. Comp.Laws Ann. § 691.1402. In Lynes, the Michigan court found that traffic signals are an integral part of the improved portion of the highway because they relate directly to the statutory duty of the state and county to maintain highways in a condition safe and fit for travel. Consequently, sovereign immunity did not bar the plaintiffs suit for negligent maintenance of a stop sign which caused an auto collision. According to McQuillen, similar reasoning is generally used to require municipalities, under a statutory obligation to maintain the streets, to prevent things adjoining or near the way from falling or otherwise coming into the streets and becoming obstructions to travel there. 19 McQuillen, Municipal Corporations Ch. 54 (1967). He writes:
[I]n order to make a municipality liable, it is not necessary that the dangerous place be within the limits of the street. It is sufficient to make the municipality liable that the dangerous place is outside the street limits but so near thereto that *59it endangers travel thereon because of the want of protecting barriers * * * and the probability of injury in case of * * * [accident] * * *.
Id. § 54.69 at 175.
In providing the highway exception to the general grant of governmental immunity, the New Mexico Legislature intended to protect the general public from injury by imposing liability upon governmental agencies when they fail to maintain safe public highways. No new duties are created by the Tort Claims Act. The duty of the Highway Department to construct and maintain certain fences along state highways existed before the Tort Claims Act was enacted.
In determining if liability for negligently maintained fences is conferred upon the Highway Department by § 41-4-11, we use the functional analysis suggested in Red-ding, supra. In that case, the issue was whether a drain grate in a road should be classified under the section of the Tort Claims Act dealing with highways and roads or the section referring to waste disposal. The Supreme Court found the latter section to be applicable, because the primary purpose of the sewer grate was the disposal of waste water and silt from the roadbed of the street. Thus, in the instant case, if the primary purpose of the highway fence is to keep the highway safe for the motoring public, rather than to keep trespassers off private land, then the effect of § 41 — 4-11 is to lift the bar of sovereign immunity in suits against the Highway Department for alleged violations of § 30-8-13(B).
A brief review of the history of § 30-8-13(B) is helpful in determining the primary purpose of the statute. In the early days, the “open range” rule, which relieved an owner of livestock from any duty to keep his animals off a public highway, prevailed in New Mexico. Thus a rancher was not required to fence his property to keep his cattle off the road. The New Mexico Supreme Court abolished this rule in 1965. In Grubb v. Wolfe, 75 N.M. 601, 408 P.2d 756 (1965), the court said that the owner of livestock may be liable for injuries to motorists resulting from collisions with his animals due to his negligence in permitting them to be on the highway. This decision placed the burden of fencing on the cattle owners in order to protect the motoring public from collisions with cattle. The Legislature reacted to the Grubb decision by enacting Laws 1966, ch. 44 § 1 [now codified, as amended, as § 30-8-13(B)] which shifted the responsibility for the construction and maintenance of fences along state highways from the cattle owners, whose property lay adjacent to the highways, to the Highway Department. See generally, 6 Nat.Resources J. 306 (1966). The purpose of § 30-8-13 [formerly § 40A-8-10, N.M.S.A.1953] is to protect the motoring public. Mitchell v. Ridgway, 77 N.M. 249, 421 P.2d 778 (1966); see, Dean v. Biesecker, 87 N.M. 389, 534 P.2d 481 (1975).
The Legislature is presumed to know the laws in existence. State v. Trivitt, 89 N.M. 162, 548 P.2d 442 (1976). Section 30-8-13(B) pre-dated the Tort Claims Act. Consequently, when it enacted the Act, the Legislature was aware of the statutory obligation of the Highway Department to construct and maintain fences along public highways where necessary to protect the public from cattle straying into the way. The purpose of the waiver of sovereign immunity in the maintenance of highways was also to protect the public. The Supreme Court of Utah found that the purpose and effect of their Governmental Immunity Act was to remove sovereign immunity in situations where formerly, but for sovereign immunity, there would have been liability. Stevens v. Salt Lake County, 25 Utah 2d 168, 478 P.2d 496 (1970). The same is true of the New Mexico Tort Claims Act. The Legislature declared:
Liability for acts or omissions under the Tort Claims Act shall be based upon the traditional tort concepts of duty * *.
Section 41 — 4-2(B), N.M.S.A.1978. The traditional tort concepts of duty include the recognition that a duty may be imposed by the Legislature. Because the Legislature *60had already imposed the burden on' the Highway Department of constructing and maintaining fences when necessary along public highways, the waiver of sovereign immunity for negligence in the maintenance ' of highways includes negligence in the maintenance of those fences. A highway through cattle country in New Mexico is just as dangerous without a fence as it is with a large pothole in it. Maintaining the highway means keeping it safe for public use.
The dismissal below is reversed and the trial court is ordered to proceed in a manner consistent with this opinion.
IT IS SO ORDERED.
WOOD, C. J., specially concurring.
WALTERS, J., concurs.