The opinion of the court was delivered by

The Parsons Street Railway and Electrical Company operates a street railway in the city of Parsons. It desired to cross the tracks of the Missouri, Kansas & Texas Railway Company in a street of that city. It applied to the state board of railroad commissioners, which body, on October 9, 1909, upon due hearing, ordered it to construct for that purpose a subway under the tracks of the railroad, in accordance with certain plans covering all the details of the work, including the approaches. On October 15 a *432proceeding by mandamus was brought in this court in the name of the state on the relation of the attorney for the board of railroad commissioners to require the street-railway company to comply with the order. The defendant answered expressing its willingness to do so if it has the necessary authority, but stating that the city ordinance under which it operates provides that its tracks shall be laid at the grade of the streets. Several.owners of property abutting on the site of the approaches shown in the plan have intervened and urge various reasons why'a peremptory writ should not be allowed. The cause is submitted upon the pleadings.

The power of the state over the public streets, whether exercised directly by the legislature, or through the city council or some other body, is absolute. (La Harpe v. Gas Co., 69 Kan. 97; Prince v. Crocker, 166 Mass. 347; 28 Cyc. 287; 15 Cyc. 626.) If the public officers who are charged by the statute with control of the matter have authorized the subway in question, the owners of the abutting property have no standing to object to its construction on their own account, however much inconvenience and injury they may suffer from it. None of their property is actually taken, and the only remedy, if any, which the law affords them for merely consequential damages is by an action for compensation. (O. O. C. & C. G. Rld. Co. v. Larson, 40 Kan. 301; City of Leavenworth v. Douglass, 59 Kan. 416; 15 Cyc. 781.) The rights of abutters under somewhat similar conditions are discussed in sections 138, 174, 178 and 191 of the third edition of volume 1 of Lewis on Eminent Domain, Notwithstanding no relief can be given them in this proceeding, it is appropriate that the individuals whose interests are injuriously affected should be heard as friends of the court, especially as no objection to the work is urged from any other quarter. The city has not been made a party, and a majority of the council *433approve the proposed plans and prefer that it shall not intervene.

Although the franchise granted by the city to the street-car company only authorizes it to lay its tracks at grade, the legislature, as the paramount authority, can enlarge its power in this regard, and this may be done directly or through some other body. (27 A. & E. Encycl. of L. 168, 178; 28 Cyc. 848; Wulf v. Kansas City, 77 Kan. 358, 373-375.)

The force of the order of the board of railroad commissioners depends wholly upon the statute. In 1907 the jurisdiction of the board was extended to electric lines, which previously had not been under its control. (Railroad Co. v. Railroad Commissioners, 78 Kan. 168.) The amended statute concludes with this provision :

“This act shall not be construed to apply to electric street, or street-railway lines operating exclusively within any county, except as to the crossings of any railroad over any other railroad, as provided in section 5974, General Statutes of 1901.” (Laws 1907, ch. 267, § 1.)

The section of the general statutes referred to, so far as here important, reads as follows:

“Any railroad company authorized to operate a railroad in this state desiring to cross or unite its track with any other railroad upon the grounds of such other railway corporation shall make application in writing to the board of railroad commissioners, stating the place of crossing or intersection; whereupon the board of railroad commissioners shall fix a day for the hearing of such application, and notify the railway corporations interested, at which time, unless further time be granted by the board, the corporations interested shall be heard in regard to the necessity, place, manner and time of such crossing or connection; and upon such hearing either party, or the board, may call and examine witnesses in regard to the matter; and the board shall, after such hearing and a personal examination of the locality where a crossing or connection is de*434sired, determine whether there is a necessity for such crossing or not, and, if so, the place thereof, whether it shall be over or under the existing railroad, or at grade, and in other respects the manner of such crossing and the terms upon which the same shall be made and maintained.” (Gen. Stat. 1901, § 5974.)

By the terms of the statute the board of railroad commissioners had power to determine that the crossing should be made at the place indicated, by means of a subway beneath the railroad tracks. But in addition to this it also had power to determine the “manner” of crossing, and we think this fairly implies the right to make any reasonable requirement having relation to the safe operation of both roads, that being a matter committed to its control. (33 Cyc. 296.) For instance, the kind of support to be provided for the surface railroad and the grade and consequent length of the approaches to the subway are details clearly subject to regulation by the board. Consequently a proper function of the board is to decide upon a plan of the work, as has been done in this case, and its decision, in the absence of exceptional circumstances, must be final. Of course, if its action, had been arbitrary or capricious, the courts could afford relief. And doubtless the city could insist upon compliance with any conditions it might see fit to impose consistent with the requirements of the board, for the purpose of minimizing any resulting damage and inconvenience.

The intervenors complain of 'public and private inconvenience that will result from the carrying out of the present plans. The situation presents, however, merely a problem in engineering. The wisdom of a particular method of construction is for the determination of the railroad board. There is nothing in the record to suggest remotely any abuse of discretion. The court can not presume to pass judgment upon the fitness of the plans adopted.

The intervenors also contend that the city should *435have been made a party to this proceeding and that in its absence there is a defect of parties. Technically, in mandamus the, only necessary parties are the plaintiff, who asserts the right to have an act done, and the defendant, upon whom the public duty rests to perform it. The practice is common and commendable to bring in other persons who are likely to be injuriously affected by the judgment', in order that they may have an opportunity to be heard in their own behalf, and in a proper case the court will suspend proceedings until this is done. (Livingston v. McCarthy, 41 Kan. 20.) But such procedure is for the protection of the persons so affected. Here no one authorized to speak for the city asks for a hearing in its behalf, a majority of the officers who by acting together could represent it disclaim any desire for it to be heard, and it is not apparent that any injury will result to it by the decision. Under these circumstances there is neither a technical nor a practical defect of parties.

The further objection is made that the plan involves the exclusive use by the railway company, not only of the subway itself, but of that portion of the street taken up by the approaches. The most 'suitable arrangement to be made in this regard is a fair matter for the determination of the railroad board. The statute (Laws 1903, ch. 122, § 58) giving the mayor and councilmen of cities of the first class authority to regulate public grounds contains a prohibition of any exclusive privilege for a railway in a street, but the restriction applies only to acts of the city officials, as it is a limitation of the power granted to them.

The final objection that is thought to require specific mention is that the writ ought not to issue because, granting that the street-railway company must construct the kind of crossing prescribed by the board or none at all, it is under no public duty to construct any, and therefore is not subject to mandamus in that regard. The allegations of the alternative writ show *436that the company is now operating a continuous line from one side of the city to the other, save for the break caused by the railroad tracks. This arrangement may be regarded as in effect an operation of the street railway across the railroad by means of a transfer, and it is competent for the railroad commissioners to order this method to be changed.

A peremptory writ will be awarded.