Va. Code § 56-21
Upon the failure of the company desiring to make any crossing pursuant to §§ 56-17 to 56-19 to receive notice of the suspension of the work on such crossing by the Commission, within thirty days after submission of the plans, specifications and descriptions as required by § 56-18, or upon the approval or modification of the plans, specifications and descriptions by the Commission, or, if an appeal be taken as aforesaid, upon the approval or modification by the Supreme Court of the plans, specifications and descriptions, and the payment of the proper compensation for damages by the company desiring to cross the works of another company, such damages to be ascertained according to the laws regulating the exercise of the right of eminent domain, work may be commenced immediately, and no order shall be made, and no injunction awarded, by any court or judge to stay the proceedings or prosecution of the work.
Va. Code § 56-21