delivered the opinion of the Court.

The appeal in this ease is, from an order of the Circuit Court of Baltimore City, passed on the- 2'Tth day of February, 1928, sustaining a demurrer to, and dismissing, the amended bill of the appellant, George, W. Bush & Sons Company, a corporation organized under the laws of the State of Delaware, against the appellees, who constitute the Public; Service Commission of Maryland.

The facts alleged in the hill are substantially as follows: The plaintiff at the time of, and prior to, the filing of the bill, was, operating, as a common carrier, a line- of steamboats on the Delaware River for the transportation, for hire, of goods, merchandise and other properties, between the cities of Philadelphia and Wilmington and, for a period approximately eighteen months before the tenth day of November, 1922, it was also operating a line of motor trucks in the transportation, for hire-, of goods and merchandise and other property, from points in Maryland to Wilmington and other points in Delaware, connecting with its line of steamboats upon the Delaware River.

While so operating its truck line, it was, prior to the tenth day of November, 1922, notified by the Public Service Obmmission of Maryland, that it would be required to file an application with, and obtain from the commission permits, before it could lawfully operate its truck lines in Maryland, over the routes upon which it was then operating.

The plaintiff, on the 20th clay of August, 1922, filed its application in the prescribed form with the commission, asking for permits to operate motor vehicles over State, state aid, improved county roads, and streets and roads of incorporated towns or cities, in the State of Maryland, in the public transportation of merchandise or freight over specified routes between Ohestertown, Maryland and the Miaryland-Delawaxe state line by way of Elkton, between Providence, Maryland, the Maryland-Delaware state line by way of Elkton, and between Havre de Gracei, Maryland, and the *572 Maryland-Delaware state line by way of Elkton, with the declared intention and purpose of extending the operation of its motor vehicles through and beyond the said Maryland-Delaware state line to Wilmington and other points in the State of Delaware. The commission set the application down for hearing on the 29th day of Hovember, 1922. On that day evidence was heard in respect to the facts contained in the application, and in said hearing the plaintiff asked that its application be deemed by the commission as asking for permits to operate said lines of motor trucks, for the purpose already stated, between points in Maryland and points in Delaware in the doing of both an interstate and an intrastate business, as well as permits to operate said lines doing an interstate business solely, which request, as alleged in the hill, was granted by the commission.

The plaintiff at the time also made known to the commission that, if the permits were granted to it to do an interstate business solely, it would take out and pay for all licenses and comply in all respects with the statutes of the State, or any rule or regulation prescribed in respect thereto by any agency or instrumentality of the State.

The commission refused the permits asked for and, in the order refusing them, passed on the 20th day of February, 1922, declared

“that the public welfare and convenience do not require tbe granting of tbe permits for wbieb applieations bave been made, as aforesaid, by tbe said Tbe George W. Busb & Sons Co., but tbat on tbe contrary that tbe granting of sucb permits would be prejudicial to tbe welfare and convenience of tbe public.”

Tbe bill alleged tbe appellant’s solvency, ability and willingness to operate its trucks in compliance with tbe law, and tbe rules and regulations of tbe commission passed and made in respect thereto.

Tbe appellant further alleged tbat it was entitled to tbe permits asked for and that the operation of tbe trucks would *573 not cause any damage or injury to the highways and bridges., other than that, caused by the same kind of motor trucks which wore, permitted to be used, and wore used thereon by others. They said the highways were not o-ver crowded, nor unduly congested, and that all the bridges, on the highways mentioned in the application are so constructed as to permit the use, over them, of heavier trucks than those used by the plaintiff.

The hill asked for an injunction restraining the conunis.sion from enforcing against the plaintiff or from prosecuting it. for or on account of any alleged violation of the law or any order of the commission prohibiting the operation by it of said motor trucks in the manner stated in the appellant’s applications.

A demurrer filed to the amended bill of the commission was by an order of the court sustained, and the bill dismissed. It w'as from that order, as we have1 already said, that this appeal was taken.

The commission, in its refusal to grant the permits asked for by the appellant, was governed and controlled by its construction of the Act of 1916, eh. 114, sec. 4, as. amended by section 4 of chapter 401 of the Act of 1922, which is as follows:

“That it shall be the duty of the Public Service Commission of Maryland, upon the application of any motor vehicle owner for a permit to operate any motor vehicle for the public transportation of merchandise or freight over any specified route to investigate the expediency of granting said permit, the number of motor vehicles to be used, and the rate to be charged, and if, in the judgment of the Public Service Commission, it is deemed best for the public welfare and convenience that said permit should be granted, said Public Service Commission is hereby empowered and authorized to grant such permit subject to such conditions and terms and for such duration of time, not exceeding the period of twenty years, as it *574 may deem advisable. But, i£ said Public Service Commission deems the granting of such permit prejudicial to the welfare and convenience of the public, then the said Public Service Commission is hereby empowered and authorized to refuse the granting of same. The said Public Service Commission of Maryland is further empowered and authorized to make such rules and regulations as it may deem necessary to govern the control and operation of same, and enforce same by such penalties, or forfeitures, as it may prescribe, including the revocation of the permit granted under the provisions of this act.”

The act in terms empowered and authorized the commission toi refuse the granting of the permits asked for by the appellant, if it deemed the granting of them was prejudicial to the welfare or convenience of the public.

The first contention of the appellant is that it was never intended by the Legislature of this State that said section 4 of the statute should apply to the operation of motor trucks over routes between points in this state and points in another state. There is certainly nothing' in the wording of the statute to indicate that it was the legislative intent to exclude such routes from its provisions, and unless it be found that the inclusion of them within the statute will be in conflict with the federal constitution or some federal statute passed pursuant thereto, the statute of this State should be held to apply to them; and this question isi involved in the second contention of the appellee, that the Legislature of this. State has no right to enact any law making the procurement of a permit necessary, before any person, firm, or corporation may lawfully operate a, motor truck line between points in this state and points in some other states, because in so doing the act would be in violation of article 1, section 8, clause 3 of the federal constitution, under which the power “to regulate commerce among the several states” was, by the states., delegated to the federal government.

*575 There have been many eases arising under the: above provision, known as the commerce clause of the federal constitution, and a number of them have heen cited by the appellant in support of its contention.

The two that it seems» chiefly to rely upon are Crutcher v. Kentucky, 141 U. S. 47; Adams Express Co. v. New York, 232 U.S. 14.

In the first of these oases (Crutcher v. Kentucky) an aot of the legislature of Kentucky provided that an agent of an express company not incorporated under the laws» of that state should not carry on business therein, without first obtaining a license from the state, and that such agents should, before obtaining such license, satisfy the auditor of the state that the company represented by him had an actual capital of at least the amount named therein, and if -he engaged in business without obtaining a license, he was subject to the payment of a fine. The Supreme Court in that case held the aot was unconstitutional, as it was: found to he in violation of the provision above mentioned.

In the Adams Express Co. case, an ordinance of the City of Hew York required an express company to obtain a local license as a condition precedent to its conducting, within the city, its interstate business. This ordinance, like the Kentucky statute, was declared unconstitutional, in that it required a party to take out a license for carrying on interstate commerce», in conflict with the commerce» clause of the Constitution.

In these» cases there» was an attempt to» prohibit persons from engaging in the classes of business therein mentioned until they had first paid the direct license or tax imposed upon them. The requirement of the act here under consideration is, that those washing to use the roads and highways, mentioned in their application, for the public transportation of merchandise or freight, shall first obtain a permit from the Ptiblic Service Commission of the State». Heither the statute nor the order appealed from imposes any burden or *576 restriction, directly or indirectly, upon the plaintiffs right to engage in interstate commerce.

As stated in the brief of the appellee, “the State, at the cost of many million dollars to the taxpayers, has established a fine system of improved public highways, and is expending millions more in the extension, improvement, and maintenance of this system.”

The public highways over* which the appellant seeks to operate its motor trucks, as instrumentalities of interstate commerce, were either built by or owned by the State, or the counties traversed by them.

It was the duty of the commission, under the statute, upon the receipt of the appellant’s application for permits to operate the motor truck lines named in the application, “to investigate the expediency of granting said permits, the number of the motor vehicles to he used and the rate to be charged,” but, as stated by the statute, if the commission deemed the granting of such permits prejudicial to the welfare and convenience of the public, they were not only empowered and authorized to refuse the granting of the permits, but it was their duty to do so.

A statutory regulation of this character is essential not only to the protection of the above mentioned highways, built at great expense to the State and counties, but also to' the safety of the public who travel upon them.

The roads and highways are subject to gpeat damage and injury when used by very large motor vehicles equipped without regard to the effect their use will have upon the roads; and of course the injury or damage is greater when large numbers of them are operated thereon; consequently the number of them used for profit and gain in the transportation of freight or passengers should he restricted to the public need or convenience and, when the number is in excess there¡of, their use becomes prejudicial to the welfare and convenience of the public.

*577 Tlie operation of motor trucks upon these highways, in most, if not in all, cases is a great convenience to the public, especially to those persons living along the route on which they are operated. It is therefore important that the use of the highways shall be so regulated as to assure the enjoyment of this right to the public, which right may he seriously affected by the failure of those to whom, the privilege is granted to give proper service, caused by tbeir inability to operate with a profit, resulting from the excessive number to whom such privilege is granted.

The, object and purpose of the act is to restrict to the needs of the public the number of motor vehicles used in the transportation of freight or merchandise, upon any one route, and thereby avoid the additional injury and damage to the road» or highways, and the danger to persons traveling thereon, that would result from the use of a greater number than the needs and convenience of the public require. It must he that the safety of the traveling public is lessened by the increased number of motor trucks operating upon the roads.

It is admitted that Congress has enacted no legislation undertaking to regulate the instrumentalities here involved for carrying on interstate commerce, and thus it would seem that this ease falls: within the class of cases which are controlled by the principles enunciated in The Minnesota Rate Cases, 230 U. S. 352. In those cases Mb. Justice Hughes, in speaking for the Court,’said:

“The grant in the Constitution of its own force, that is, without action by Congress, established the essential immunity of interstate commercial intercourse from the direct control of the states with respect to those subjects embraced within the grant which are of such a nature as, to demand that, if regulated at all, their regulation should he prescribed by a single authority. It has repeatedly been declared by this Court that as to those subjects which require a general system or uniformity of regulation the power of Congress is exclusive. In other matters, admitting of diversity of treat *578 ment according to the special requirements of local conditions, the states may act within their respective jurisdictions until Congress sees fit to act; and, when Congress does act, in the exercise of- its authority overrides all conflicting state legislation.

“The principle, which determines this classification, underlies the doctrine that the states cannot under any guise impose direct burdens upon interstate commerce. Eox this is but to hold that the states are not permitted directly to regulate or restrain that which from its nature should be under the control of the one authority and be free from restriction save as it is governed in the manner that the national legislature constitutionally ordains.

“Thus, the states cannot tax interstate commerce, either by laying the tax upon the business which constitutes such commerce or the privilege of engaging in it, or upon the receipts, as such, derived from it.

“They have no power to prohibit interstate trade in legitimate articles of commerce; or to discriminate against the products of other states; or to exclude from the limits of the state corporations or others engaged in interstate commerce or to fetter by conditions their right to carry it on; or to prescribe the rates to be charged for transportation from one state to another, or to' subject the operations of carriers in the course of such transportation to requirements that are unreasonable or pass beyond the hounds of suitable local protection.

“But within these limitations there necessarily remains to the states, until Congress acts, a wide range for the permissible exercise of power appropriate to their territorial jurisdiction although interstate commerce may he affected. It extends to those matters of a local nature as to which it is impossible to derive from the constitutional grant an intention that they should go uncontrolled pending federal intervention. Thus, there are certain subjects having the most obvious and direct relation to interstate commerce, which never *579 theless, with the acquiescence of Congress, have been controlled by state legislation from the foundation of the government because of the necessity that they should not remain unregulated and that their regulation should be adapted to varying local exigencies; hence, the absence of regulation by Congress in such matters has not imported that there should be no restriction but ratber that the states should continue to supply the needed rules- until Congress should decide to supersede them. Further, it is competent for a state to govern its internal commerce-, to provide lo-cal improvements, to create and regulate local facilities, to adopt protective measures of a reasonable character in tbe interest of the health, safety, morals- and welfare- of its people:, although interstate commerce may incidentally or indirectly be involved. Our system of government is a practical adjustment by which the national authority as conferred by the Constitution is maintained in its full scope without unnecessary loss of local efficiency. Whore the subject is peculiarly one of local concern, and from its nature belongs- to the class with which the state appropriately deals in making reasonable provision for local needs, it cannot be regarded as. left to the. unrestrained will of individuals because Congress has not acted, although it may have such a relation to interstate commerce as to he within the reach of the federal power. In such case, Congress must ho the judge of the- necessity of federal action. Its paramount authority always enables it to intervene at its discretion for tbe complete and effective government of that which has been committed to its care-, and, for this purpose and to- this extent, in response to- a conviction of national need, to displace local laws- by substituting laws of its own. The successful working of our constitutional system has thus been made possible.”

To shorten this opinion we have- omitted from the above decision the great numbers- of cases cited in support of the principles therein stated.

If the contention of the appellant he correct, that the attempted regulation of the use of the highways of this State *580 by tbe Public Service Commission under tbe statute mentioned is unconstitutional and void when applied to the appellant and others who apply for permits to engage in the transportation of freight and merchandise' from points in this state to points in some other state, then there are no regulations of the use of the highways nor can there he any until Congress sees fit to pass them, and this it may never do. If it does not, these valuable highways of the state will be subject to the use of motor vehicles of all sizes and character by the persons mentioned. This should not be, and, in our opinion, is not the law. But as we have said, this case is controlled by the principles laid down in The Minnesota Rate Cases, and until Congress passes some legislation regulating the use of said highways by the instrumentalities here mentioned, the right to do so, within the limitations mentioned in those cases, is lodged with the Legislature of this State.

This precise question has not been before this or any other court, so far as we are informed, though it has been disposed of adversely to the contention of the appellant by the Public Service Commissions of the States of Pennsylvania and Hew York in the cases of Chambersburg, etc., Rwy. Co. v. Hardman, Public Utilities Reports, 1921 C, 628, and In Re Engelke, Public Utilities Reports, 1922 C, 71.

As we find no error in the court’s ruling in sustaining the demurrer to the hill and in dismissing it, we will affirm the order appealed from.

Order affirmed, with costs.