¶1OPINION
¶2The State of Texas and the Texas Department of Transportation (collectively “the State”) appeal from the trial court’s award of $497,637.80, including costs, to appellees George and Patricia Delany. Appellees had originally brought an inverse condemnation action arising from the State’s removal of the highway (the “Connector Road”) connecting the north*658bound frontage road of Interstate 45 to Johnny Palmer Road. The State filed a plea to the jurisdiction, which was denied by the trial court. On interlocutory appeal, the First Court of Appeals affirmed and remanded the case for trial on the merits.
¶3The State presents four issues for review. It contends: (1) appellees’ inverse condemnation claim is not ripe for review; (2) appellees failed to prove an unconstitutional taking of access to their property as a matter of law; (3) the trial court committed reversible error in refusing to permit the State to make an offer of proof; and (4) the trial court abused its discretion in awarding sanctions against the State. We affirm.
¶4Ripeness
¶5In one issue, the State argues appellees’ inverse condemnation claim is not ripe for review. Appellees counter by arguing the law-of-the-case doctrine bars the State from relitigating the ripeness issue because the First Court of Appeals has already ruled on this claim in a prior appeal. We agree with appellees’ contention.
¶6The Supreme Court of Texas recently defined the law-of-the-case doctrine as “that principle under which questions of law decided on appeal to a court of last resort will govern the case throughout its subsequent steps.”
¶7The law-of-the-case doctrine therefore bars relitigation of the State’s ripeness claim unless either: (1) the earlier holding is clearly erroneous or (2) the later stage of litigation presents different parties, different issues or more fully developed facts.
¶8Unconstitutional Taking
¶9In its second issue, the State argues the trial court erred in holding that an unconstitutional taking occurred when the State removed the Connector Road abutting ap-pellees’ property. While the State raises several claims in connection with this issue, we find none requires reversal.
¶10The State first claims that redesigning exit ramps within its existing right-of-way is not an unconstitutional taking as a matter of law. However, it is well settled that a direct physical invasion of property is not required under Article I, Section 17 of the Texas Constitution to entitle a landowner to compensatory damages.
¶11Second, the State claims the trial court erred in concluding appellees had a vested easement of access to the Connector Road. As we have previously stated, an abutting landowner possesses an easement of access to and from the highway.
¶12Texas courts have refused to extend to an abutting landowner the right of access when an intervening strip of land separates the landowner’s property from the road’s surface.
¶13Fourth, the State claims appel-lees had an easement of access from their property to the Interstate 45 frontage road because their property abuts the State’s right-of-way. We disagree. While appel-lees’ property abuts land formerly used as right-of-way for the Connector Road, that road no longer exists. Abandonment occurs when the use for which the property was dedicated becomes either impossible or so highly improbable as to become practically impossible, or where the object of the use wholly fails.
¶14Fifth, the State claims the trial court improperly concluded its proposed driveways were unsafe and dangerous as a matter of law because the testimony cannot support a finding of denial of access. When conducting a legal sufficiency review, we disregard all evidence and inferences contrary to the trial court’s finding.
¶15Sixth, the State claims the trial court erred in finding a material and substantial impairment of access to appellees’ property. We disagree. Whether access rights have been materially and substantially impaired is a question of law.
¶16Offer of Proof
¶17In its third issue, the State argues the trial court committed reversible error in refusing to permit the State to make an offer of proof during the trial on damages. The State sought to “offer and develop testimony regarding the severity of the impairment of access to the property or the viability and cost” of the driveway proposals it put forth during the preliminary hearing on access rights and impairment.
¶18Error may not be predicated upon a ruling that excludes evidence unless a substantial right of the party is affected.
¶19Moreover, the testimony the State sought to offer and develop concerning the impairment of access and the viability and cost of the driveway proposals was immaterial to the issue of damages. Once ap-pellees established, and the trial court held, they had “no legal access to any road, street, or highway of any sort” and the driveways proposed by the State could not serve as “suitable means of access,” the only remaining issue was the amount of compensation due. This amount is measured by the difference in the market value of the property before and after the State removed the Connector Road.
¶20The Sanctions Award
¶21In its fourth issue, the State argues the trial court abused its discretion in awarding sanctions against its counsel for *662discovery misconduct. The trial court found the State’s counsel asserted frivolous objections and made groundless and repeated instructions not to answer questions posed by opposing counsel during the depositions of Frances Willison and Marty Kobs. We will overturn a trial court’s discretionary imposition of sanctions only when it is based on an erroneous view of the law or a clearly erroneous assessment of the evidence.
¶22The State contends it could properly invoke the attorney-client privilege during the deposition of Kobs because, in addition to his administrative duties, Kobs provided legal advice to the State. We disagree. The State had no legal basis for invoking the attorney-client privilege — even if Kobs was a licensed attorney at the time the alleged privileged communications occurred. The privilege does not apply to communications between an attorney and his client when the attorney is employed in a non-legal capacity.
¶23The State also contends it properly invoked the work-product privilege during the depositions at issue. But during the Kobs deposition, the State repeatedly instructed the witness not to answer questions dealing with facts pertinent to the case
¶24The trial court also found the State asserted frivolous objections during the depositions at issue. Counsel for the State objected to the form of the question 95 times over a span of 76 pages in the Willison deposition transcript. Many of those objections were without any legal basis whatsoever. Therefore, we uphold the trial court’s finding that counsel for the State asserted frivolous objections during pre-trial discovery. Accordingly, we find the trial court did not abuse its discretion in awarding sanctions against the State, and overrule the State’s fourth issue.
¶25Conclusion
¶26The judgment of the trial court is affirmed.
¶27. See State and Dept. of Transp. v. Delany, No. 01-00-01170-CV, 2001 WL 493110 (Tex.App.-Houston [1st Dist.] May 10, 2001).
¶28. See State v. Wood Oil Distributing, Inc., 751 S.W.2d 863, 865 (Tex.1988) ("It is incumbent upon the trial court to make this determination [of whether there has been a material and substantial impairment of access] prior to trial and to control the admission of evidence accordingly.”).
¶29. Briscoe v. Goodmark Corp., 102 S.W.3d 714, 716 (Tex.2003).
¶30. The Supreme Court dismissed for want of jurisdiction the State’s petition for review of the judgment rendered by our sister court.
¶31. See, e.g., City of Houston v. Precast Structures, Inc., 60 S.W.3d 331, 338 (Tex.App.Houston [14th Dist.] 2001, pet. denied); Russell v. City of Bryan, 919 S.W.2d 698, 704 (Tex.App.-Houston [14th Dist.] 1996, writ denied); Brown v. Owens, 663 S.W.2d 30, 33-34 (Tex.App.-Houston [14th Dist.] 1983), aff'd in part and rev’d in part (on other grounds), 674 S.W.2d 748 (Tex.1984); Barrows v. Ezer, 624 S.W.2d 613, 617 (Tex.Civ.App.-Houston [14th Dist.] 1981, no writ). See also 6 Tex. Jur. 3d Appellate Review §§ 901-02 (1996).
¶32. See Houston Endowment, Inc. v. City of Houston, 468 S.W.2d 540, 543 (Tex.Civ.App.-Houston [14th Dist.] 1971, writ ref'd n.r.e.).
¶33. See Briscoe, 102 S.W.3d at 716-717; Hudson v. Wakefield, 711 S.W.2d 628, 630 (Tex.1986).
¶34. DuPuy v. City of Waco, 396 S.W.2d 103, 108 (Tex.1965).
¶35. State v. Meyer, 403 S.W.2d 366, 370 (Tex.1966).
¶36. DuPuy, 396 S.W.2d at 108; State v. Heal, 917 S.W.2d 6, 9 (Tex.1996).
¶37. Heal, 917 S.W.2d at 8.
¶38. See infra note 9.
¶39. See State v. Fuller, 407 S.W.2d 215, 221 (Tex.1966) (landowners’ property did not abut public road when separated by an abandoned railroad right-of-way on property owned by the State); City of Wichita Falls v. Thomas, 523 S.W.2d 312, 314 (Tex.Civ.App.-Fort Worth 1975, writ ref'd n.r.e.) (landowner’s property did not abut public road when it was separated by strip of land belonging to the city that was not used as a right-of-way); Mun. Inv. Corp. v. Triplett, 371 S.W.2d 124, 126 (Tex.Civ.App.-Amarillo 1963, writ ref'd n.r.e.) (landowners’ property separated by vacant strip of land not being used as a right of way did not abut public road).
¶40. See Sebree v. Bd. of County Comm’rs, 16 Kan.App.2d 772, 829 P.2d 610, 616 (1992), aff'd, 251 Kan. 776, 840 P.2d 1125 (1992); Miller v. Berryhill Nursery Co., 7 Ohio App.2d *66030, 36 O.O.2d 89, 218 N.E.2d 467, 470 (1966); State v. Northwest Airlines, Inc., 413 N.W.2d 514, 518 (Minn.Ct.App.1987).
¶41. Adams v. Rowles, 149 Tex. 52, 228 S.W.2d 849, 852 (1950).
¶42. See Fuller, 407 S.W.2d at 221.
¶43. See Lenz v. Lenz, 79 S.W.3d 10, 19 (Tex.2002).
¶44. See id.
¶45. Heal, 917 S.W.2d at 9.
¶46. Tex.R. Evid. 103(a).
¶47. See Tex.R.App. P. 44.2(b).
¶48. See Williams Distributing Co. v. Franklin, 898 S.W.2d 816, 817 (Tex.1995).
¶49. Pennington v. Brock, 841 S.W.2d 127, 131 (Tex.App.-Houston [14th Dist.] 1992, no writ).
¶50. See Tex.R. Evid. 103(a)(2).
¶51. See State v. Schmidt, 867 S.W.2d 769, 772-73 (Tex.1993), cert. denied, 512 U.S. 1236, 114 S.Ct. 2741, 129 L.Ed.2d 861 (1994) and 513 U.S. 812, 115 S.Ct. 64, 130 L.Ed.2d 21 (1994).
¶52. See Downer v. Aquamarine Operators, Inc., 701 S.W.2d 238, 241-42 (Tex. 1985), cert. denied, 476 U.S. 1159, 106 S.Ct. 2279, 90 L.Ed.2d 721 (1986).
¶53. Harlandale Indep. Sch. Dist. v. Cornyn, 25 S.W.3d 328, 332 (Tex.App.-Austin 2000, pet. denied).
¶54. The State asserted the work product privilege in response to questions concerning, e.g., Kobs’ involvement in the case, the names of people Kobs met with in connection with the case, and the existence or non-existence of a road in front of appellees’ property.
¶55. See Owens-Corning Fiberglas Corp. v. Caldwell, 818 S.W.2d 749, 750 (Tex.1991) (stating that protection granted under work product privilege does not extend to facts of case an attorney may acquire). See also Tex.R. Civ. P. 192.5.