*109 OPINION OF THE COURT
Plаintiff Ned Church, age nine, received catastrophic spinal injuries December 26, 1992, when the driver of a Volkswagen Jetta in which he was a rear seat occupant fell asleep at the wheel. The vehicle veered off the southbound traffic portion of the New York State Thruway near milepost marker 132.7, careened down a nontraversable embankment and crashed in a V-shaped ditch at the bottom. The Thruway site where the vehicle left the highway was within a 22-mile resurfacing and safety-improving project, which was completed in 1986 pursuant to an agreement between the Thruway Authority and Callanan Industries, Inc., as general contractor.
Pursuant to its contract with the Thruway Authority, C allanan agreed, by a date certain, to “construct and complete in the most substantial and workmanlike manner, the construction, imрrovement or reconstruction of the project” identified in the project plans and specifications. The project specifications called for the removal of some 275 feet of existing guiderail in the vicinity of milepost marker 132.7 and its replacemеnt by a longer (312.5 feet) guiderail system. The contract documents also contemplated Callanan’s use of subcontractors on the project.
In a related agreement, the Thruway Authority engaged the construction engineering firm of Clough, Harbour & Associates as projеct “Engineer” to inspect and supervise Callanan’s compliance with the contract plans and specifications. Under the Thruway Authority’s agreement with Callanan, the engineer’s recommendation was required before final acceptance of the cоntractor’s work.
Callanan entered into a subcontract with defendant San Juan Construction and Sales Company for the installation of the guiderail system in question. The subcontract incorporated the general contract by reference. It also stipulated that “[a] 11 drаwings, * * * certifications [and] approvals of the Subcontractor shall be submitted for approval of the Architect or Engineer,” that is, “the person appointed by the Owner to supervise the work of the Contractor on behalf of the Owner.” In addition, Callanan reserved the right to demand at any time that San Juan furnish evidence of its ability to fully perform the subcontract in the manner and within the time specified in the subcontract.
Suit was brought on behalf of the infant plaintiff against Callanan, San Juan and Clough Harbour. The gravamen of the *110 action was both the negligеnt failure to complete the full 312.5 feet of new guiderailing called for by the Callanan general contract and the San Juan subcontract, and Clough Harbour’s negligent inspection and approval of the installation despite such noncompletion. Specificаlly, the complaint alleged that (1) San Juan installed only some 212 of the 312.5 feet of guiderailing called for by the contracts; (2) the missing portion of the guiderail installation included the place where the Jetta went out of control and left the highway; and (3) as a result of the negligent noncompletion of the guiderail installation, the infant plaintiff incurred devastating injuries when the Jetta crashed at the bottom of the embankment.
After joinder of issue and discovery, Callanan and San Juan moved for summary judgment dismissing the complaint, based in part on the contention that, as purely contracting parties with respect to installation of the guiderailing, they owed no duty to plaintiffs. Plaintiffs’ response was that both defendants undertook a duty to perform safety improvements and were liable for their “negligent performance of these imprоvements [which] directly caused Ned Church’s injuries.” Plaintiffs described the duty claimed here as follows: “It is well established law that where one undertakes work on a public highway which if not done carefully will create dangerous conditions to the general public, he is under a duty to use requisitе care and that duty cannot be delegated.” They submitted opinion evidence that, had the guiderailing been completed in accordance with the Callanan and San Juan contracts, the Jetta would have been prevented from plunging down the embankment and crаshing at the bottom, thereby causing the infant plaintiff’s serious injuries. Supreme Court denied the motion for summary judgment. On appeal from that denial, the Appellate Division reversed and granted summary judgment to San Juan (
The case is before this Court as of right, pursuant to CPLR 5601 (d), on the basis of the two-Justice dissent at the Appellate Division. We now affirm.
The threshold and dispositive question on this appeal is whether San Juan owed the infant plaintiff a duty of care. The existence and scope of a duty of care is a question of law for
*111
the courts entailing the consideration of relevant policy factors
(see Hamilton v Beretta U.S.A. Corp.,
Beginning with Chief Judge Cardozo’s landmark decision in
H.R. Moch Co. v Rensselaer Water Co.
(
As more extensively discussed in
Espinal v Melville Snow Contrs.
(
Thе second set of circumstances giving rise to a promisor’s tort liability is where the plaintiff has suffered injury as a result of reasonable reliance upon the defendant’s continuing performance of a contractual obligation (see Espinal, 98 NY2d *112 at 140 [“where the plaintiff detrimentally relies on the continued performance of the contracting party’s duties”]; see also Prosser and Keeton, supra at 658; Restatement [Second] of Torts § 324A [c]).
Third, we have imposed tort liability upon a promisor “where the contracting party has entirely displaced the other party’s duty to maintain the premises safely” (Espinal,
Plaintiff fails to qualify under any of the foregoing exceptions. There is no evidence in the record that San Juan’s incomplete performanсe of its contractual duty to install 312.5 feet of guiderailing falls within the first exception — i.e., that it created or increased the risk of the Jetta’s divergence from the roadway beyond the risk which existed even before San Juan entered into any contractual undertaking. In this respect, San Juan classically exemplifies the promisor described in
Moch
who is immune from liability because the breach of contract consists “merely in withholding a benefit * * * where inaction is at most a refusal to become an instrument for good”
(Moch,
Likewise, this case does not fall within the second exception. It is not (and cannot be) contended here that the tragic loss of control of the Jetta occurred because the driver “detrimentally relie [d] on the continued performance of [San Juan’s contractual] duties”
(Espinal,
Nor can San Juan’s liability be sustained under an assumption of the Thruway Authority’s safety duty theory under Palka or Espinal, both of which are instructive while reaching opposite results. They teach that tort liability for breach of contract will not be imposed merely because there is some safety-related aspect to the unfulfilled contractual obligаtion. If liability invariably follows nonperformance of some safety-related aspect of a contract, the exception would swallow up the general rule against recovery in tort based merely upon the failure to act as promised. Thus, the open-ended possibility of *113 liability apprehended by Chief Judge Cardozo in Moch would become a reality. Our decision denying the promisors’ liability in Eaves Brooks demonstrates that there are limitations on the imposition of liability based upon a defendant’s assumption of its promisee’s duty to safeguard third persons.
Palka
illustrates the kind of additional factors which may support recovery in tort upon the theory that the promisor assumed the promisee’s safety responsibilities. In
Palka,
the plaintiff nurse-employee of a hospital was injured when a defectively maintained fan fell on her while she was caring for a patient. In holding the prоof sufficient to impose liability upon the maintenance company with whom the hospital had a service contract, we relied upon the evidence that the contract was “comprehensive and exclusive” (
Contrariwise, in
Espinal,
we declined to impose liability upon a snow removal contractor, absent evidence that it created or exacerbated a dangerous condition becаuse, under the terms of the contract, the promisee effectively “at all times retained its landowner’s duty to inspect and safely maintain the premises” (
This case falls comfortably within the Espinal precedential orbit. 2 Unlike the circumstances presented by Palka, San Juan did not comprehensively contract to assume all the Thruway Authority’s safety-related obligations with respect tо the guide-rail system. Instead, the Thruway Authority retained a separate project engineer to provide inspection and supervision of all aspects of the project, including contract compliance with respect to the stipulated length of the guiderаil system. These roles of the project engineer were specifically incorporated into *114 both sets of the relevant contract documents, which required the engineer’s approval of the work.
The San Juan contract can be contrasted with Callanаn’s. In its contract with the Thruway Authority, Callanan assumed significant obligations to assure that the construction complied with the project specifications and that such work was completed in a timely fashion, thus inferably undertaking an obligation to inspect and oversee all aspects of the subcontractors’ work.
Undisputably, under the contractual framework, San Juan never assumed the Thruway Authority’s common-law tort duty to oversee and insure the installation of the adequately safe length of guiderailing in the vicinity of milepost marker 132.7 of the southbound Thruway. Likеwise, inspection responsibilities as to the proper length of guiderail were never contractually shifted to San Juan (see Prosser and Keeton,
supra
§ 93, at 669
[“Tort Liability for Physical Harm to Persons and Tangible Things Resulting from Failure to Repair or Inspect”]).
Rather, the Thruway Authority (owner) eithеr retained those safety responsibilities
(see Espinal,
For the foregoing reasons, we conclude that San Juan owed no cognizable duty to plaintiff to complete its contractual obligation under the circumstances of this case. Accordingly, the judgment of Supreme Court and the priоr order of the Appellate Division brought up for review should be affirmed, with costs.
Chief Judge Kaye and Judges Smith, Ciparick, Wesley, Rosenblatt and Graffeo concur.
Judgment appealed from and order of the Appellate Division brought up for review affirmed, with costs.
Notes
. During the pendеncy of the appeals, plaintiffs settled their suits against Callanan and Clough Harbour.
. Contrary to plaintiffs’ contention, Espinal and the cases it discusses cannot be distinguished on the basis that the contractual obligations in all of them were executory, rather than executed, as in the instant case. The principles outlined in Espinal equally apply to executed contracts, such as an undertaking to repair a single device (see Prosser and Keeton, supra § 93, at 669-670).
