STATE of Texas, Petitioner, v. HOUDAILLE INDUSTRIES, INC., d/b/a Houdaille-Duvall-Wright, Respondent, 632 S.W.2d 723

POPE, Justice. The question presented is whether the State of Texas, in a suit to recover civil penalties authorized by

section 16(

b) of

article 911b, the Motor Carrier Act, had to allege and prove that the violation was done with knowledge or intent. The State sued Houdaille Industries, Inc., to recover civil penalties and for judgment permanently enjoining Houdaille from aiding and abetting the transportation of its products over Texas highways by an uncertificated carrier. The State alleged that Houdaille on sixty-six separate occasions commencing on January 5, 1978, and continuing to November 20, 1978, had hired and paid L & L Trucking Company to transport concrete doors from its plant at Pearland, Texas, to other points in the state. The trial court sustained defendant’s motion for

summary judgment and the court of civil appeals affirmed the judgment. 617 S.W.2d 802. We reverse the judgments of the courts below. L & L Trucking did not have a certificate of public convenience and necessity and, in a prior suit, had agreed to a judgment for penalties in the sum of $3,500 for its violations of the Motor Carrier Act,

article 911b. The State then brought this suit against Houdaille, the shipper. The basis for granting Houdaille’s motion for

summary judgment was that the State did not allege that Houdaille, when placing the shipments with the uncertificated carrier, knowingly or intentionally promoted or assisted in the violation of

article 911b. Houdaille’s attack upon the sufficiency of the State’s pleadings should ordinarily have been by special exception, so that the State might have had an opportunity to amend its pleadings. Texas Department of Corrections v. Herring, 513 S.W.2d 6, 10 (Tex.1974). At the

summary judgment hearing, however, the parties agreed in writing that, had the trial court sustained an exception prior to the motion for

summary judgment and granted time for the State to amend and plead that Houd-aille had knowledge and intent, the State would not have done so. This squarely posed the question before us now. The State’s position is that it may impose penalties against one who procures, aids or abets the violation of the Motor Carrier Act without proof that the shipper knowingly or intentionally hired an uncertificated carrier. We agree with that contention. We are here concerned only with

section 16(b), the statute concerning penalties.

Section 16(

a) is also relevant, however, in that it aids in the construction of

section 16(b). Sections 16(

a) and 16(

b) of

article 911b provide: (

a) Every officer, agent, servant or employee of any corporation and every other person who violates or fails to comply with or procures, aids or abets in the violation of any provision of this Act or who violates or fails to obey, observe or comply with any lawful order, decision, rule or regulation, direction, demand, or requirement of the Commission shall be guilty of a misdemeanor and, upon conviction thereof, shall be punished by a fine of not less than Twenty-Five Dollars ($25.00), nor more than Two Hundred Dollars ($200.00), and the violations oc-curing [sic] on each day shall each constitute a separate offense. (

b) Every officer, agent, servant or employee of any corporation and every other person who violates or fails to comply with or procures, aids or abets in the violation of any provision of this Act or who violates or fails to obey, observe or comply with any lawful order, decision, rule or regulation, direction, demand or requirement of the Commission shall in addition be subject to and shall pay a penalty not exceeding One Hundred Dollars ($100.00), for each and every day of such violation. Such penalty shall be recovered in any Court of competent jurisdiction in the county in which the violation occurs.

Suit for such penalty or penalties shall be instituted and conducted by the Attorney General of the State of Texas, or by the County or District Attorney in the county in which , the violation occurs, in the name of the State of Texas. Legislative History of

Section 16(

b) The legislative history of

section 16(

b) shows that the legislature did not intend to require knowledge or intent as elements of an action for penalty. The Motor Carrier Act was enacted in Texas by the Forty-First Legislature in 1929. See 1929 Tex.Gen.Laws, ch. 314, at 698-710. Sections 16(

a) and 16(

b) were substantially the same in the original act as they are today, except for provisions for greater fines and penalties.

Section 16(

a) provided that violations were criminal misdemeanors;

section 16(

b) authorized civil penalties. Two years after the original enactment in 1931, the Forty-Second Legislature generally rewrote the Motor Carrier Act, making minor amendments to sections 16(

a) and 16(b). See 1931 Tex.Gen.Laws, ch. 277, at 480-97. Those provisions have not been amended since 1931. Other revisions by the Forty-Second Legislature are very helpful in disclosing the legislature’s intent. The same legislative act that enacted the amendments to

section 16 also enacted

section 6cc.

Section 16 was silent about any requirement for knowledge or intent.

Section 6cc, however, expressly required the prohibited action to be done knowingly. This is the amendment: No motor carrier operating in whole or in

part in this State under certificate or permit issued by the Railroad Commission of Texas, or any officer or agent of such motor carrier, shall require or knowingly permit any truck driver or his helper drive or operate a truck for a period longer than fourteen (14) consecutive hours; and whenever such driver or helper shall have been continuously on such duty for fourteen (14) hours, he shall be relieved and shall not be required or knowingly permitted to again go on duty until he has had at least eight (8) consecutive hours off duty; and no such driver or helper who has been on such duty fourteen (14) hours in the aggregate in any twenty-four (24) hour period, shall be required or knowingly permitted to continue or again go on duty without having had at least eight (8) consecutive hours off duty; and venue for prosecution under this

section shall lie in the county of the residence of the defendant; provided, that in cases of emergency caused by the act of God, the foregoing restrictions as to hours shall not apply. 1931 Tex.Gen.Laws, ch. 277, § 6cc, at 487 (emphasis added). Continuously since 1931

section 6cc has prohibited a carrier’s officer or agent from “knowingly” permitting drivers to operate a truck for more than the permitted hours and from “knowingly” permitting the driver to return to duty until he had been off duty for eight hours. The requirement of knowledge in

section 6cc and its omission in

section 16, when taken with the fact that the same Forty-Second Legislature enacted both sections of the act at the same session, demonstrates that the legislature required knowledge in the one instance but did not intend it in the other. Additional reasons support this conclusion. After the Forty-First Legislature enacted

section 16 in 1929, Vernon Law Book Company, in compiling the statutes, separated

section 16 from all the other sections of

article 911b and compiled it as

article 1690b of Vernon’s Annotated Penal Code. This transfer from the civil statutes to the penal code included

section 16(b), the civil penalty provision. The Revised Penal Code, effective January 1, 1974, added

article 6.02 to provide some uniformity in the Texas Penal Code concerning the requirement of culpability.

Article 6.02(

b) says that a culpable mental state is required unless the definition of an offense dispenses with it. The Penal Code defines offenses as misdemeanors, art. 1.07(21), and felonies, art. 1.07(14). It does not define or relate to civil penalties. The same act of the Sixty-Third Legislature that enacted

article 6.02 of the Penal Code expressly transferred

section 16 of the Motor Carrier Act back to its original place in

article 911b of the civil statutes. 1973 Tex. Gen.Laws, ch. 399, § 5, at 995-96L As stated previously, the law book company, and not the legislature, had moved

section 16 into the Penal Code and assigned it a number. The civil penalties for violation of the motor carrier act were neither enacted nor intended by the Legislature to be part of the Penal Code. When the Legislature made culpability a general requirement for misdemeanors and felonies, it simultaneously expressly ordered that both sections 16(

a) and 16(

b) be removed from the Penal Code and restored in the civil statutes as originally intended.

Article 6.02 became effective in its requirement of culpability on January 1,1974. On that date,

section 16(b), by legislative mandate, was no longer compiled as a penal statute.

Article 6.02 of the Penal Code thus does not apply to

section 16(

b) of

article 911b. General Welfare Offenses Civil penalty statutes are of comparatively recent historical origin. These offenses have been termed “public welfare offenses.” Sayre, Public Welfare Offenses, 33 Colum.L.Rev. 55 (1933).

The development is the natural result of two pronounced movements marking twentieth century criminal administration, i.e., (1) the shift of emphasis from the protection of individual interests that marked nineteenth century criminal administration to the protection of public and social interests, and (2) the growing utilization of the criminal law machinery to enforce, not only the true crimes of the classic law, but also a new type of twentieth century regulatory measure involving no moral delinquency. Sayre, supra at 67. Knowledge and intent were early excused in proof of minor crimes.

The early cases in this country arose in the courts of Massachusetts and concerned primarily the sale of liquor and adulterated milk. See, e.g. Commonwealth v. Boynton, 2 Allen 160 (Mass.1861); Commonwealth v. Farren, 9 Allen 489 (Mass.1864). The doctrine soon spread to other states and other types of police regulations. See cases cited in Sayre, supra at 65 n.41, 66 n.43. The issue found its way to the United States Supreme Court in a .criminal case, United States v. Balint, 258 U.S. 250, 42 S.Ct. 301, 66 L.Ed. 604 (1922).

In Balint, defendant was indicted for violating the Narcotic Act of 1914, which prohibited the sale of opium without the permission of the Commissioner of Internal Revenue. In holding that the statute did not require proof of the defendant’s intent, the court stated: It has been objected that punishment of a person for

an act in violation of law when ignorant of the facts making it so, is an absence of due process of law. But that objection is considered and overruled in Shevlin-Carpenter Co. v.

Minnesota, 218 U.S. 57, 69, 70 [30 S.Ct. 663, 666, 54 L.Ed. 930], in which it was held that in the prohibition or punishment of particular acts, the State may in the maintenance of a public policy provide “that he who shall do them shall do them at his peril and will not be heard to plead in defense good faith or ignorance.” Many instances of this are to be found in regulatory measures in the exercise of what is called the police power where the emphasis of the statute is evidently upon achievement of some social betterment rather than the punishment of the crimes as in cases of mala in se.

Id. at 252, 42 S.Ct. at 302. The Balint analysis was later referred to by Judge Frankfurter in United States ex rel. Marcus v. Hess, 317 U.S. 537, 63 S.Ct. 379, 87 L.Ed. 443 (1943), to show the distinction between criminal and civil penalties: Punitive ends may be pursued in civil proceedings, and, conversely, the criminal process is frequently employed to attain remedial rather than punitive ends.

It is for this reason that scienter has not been deemed to be a requirement in some criminal prosecutions. “Many instances of this are to be found in regulatory measures in the exercise of what is called the police power where the emphasis of the statute is evidently upon achievement of some social betterment rather than the punishment of the crimes ...” United States v. Balint, 258 U.S. 250, 252 [42 S.Ct. 301, 302, 66 L.Ed. 604]. Id. 317 U.S. at 554, 63 S.Ct. at 389. (Frankfurter, J., concurring). In United States v.

Dotterweich, 320 U.S. 277, 64 S.Ct. 134, 88 L.Ed. 48 (1943), Justice Frankfurter was concerned with a case in which a corporate officer was convicted on charges that the corporation shipped adulterated and misbranded drugs in interstate commerce in violation of

section 301 of the Federal Food, Drug and Cosmetic Act. Justice Frankfurter stated: The prosecution to which Dotterweich was subjected is based on a now familiar type of legislation whereby penalties serve as effective means of regulation. Such legislation dispenses with the conventional requirement for criminal conduct — awareness of some wrongdoing. In the interest of the larger good it puts the burden of acting at hazard upon a person otherwise innocent but standing in responsible relation to a public danger. United States v. Balint, 258 U.S. 250 [42 S.Ct. 301, 66 L.Ed. 604]. And so it is clear that shipments like those now in issue are “punished by the statute if the

article is misbranded [or adulterated], and that the

article may be misbranded [or adulterated] without any conscious fraud at all. It was natural enough to throw this risk on shippers with regard to the identity of their wares ...” United States v. Johnson, 221 U.S. 488, 497-98 [31 S.Ct. 627, 628, 55 L.Ed. 823]. ****** Balancing relative hardships, Congress has preferred to place it upon those who have at least the opportunity of informing themselves of the existence of conditions imposed for the protection of consumers before sharing in illicit commerce, rather than to throw the hazard on the innocent public who are. wholly helpless.

Id. 320 U.S. at 280-81, 285, 64 S.Ct. at 136, 138. The Texas Court of Criminal Appeals has excused knowledge and intent even in purely criminal cases in harmony with these decisions of the United States Supreme Court. Prior to 1974, the Court of Criminal Appeals consistently rejected attacks upon traffic convictions on the grounds that there was no proof of intent. See Vallejo v. State, 408 S.W.2d 113 (Tex.Cr.App.1966); Wilson v. State, 168 Tex.Cr. 439, 328 S.W.2d 311 (1959) (on motion for rehearing); Rowland v. State, 166 Tex.Cr. 118, 311 S.W.2d 831 (1957); Goodwin v. State, 63 Tex.Cr. 140, 138 S.W. 399 (1911).

After the enactment of the Revised Penal Code in 1974, the court again held in Zulauf v. State, 591 S.W.2d 869 (Tex.Cr.App.1979), that a speeding violation did not require proof of a culpable mental state: The clear command of

Article 6701d, § 166, supra, that: “. .. . [n]o person shall drive a vehicle on a highway at a speed greater than is reasonable and prudent under the circumstances then existing ...” provides more than adequate support for our holding herein that the Legislature intended to make speeding a strict liability offense where liability would not be contingent upon the allegation of a culpable mental state. * * * * * * Given the absolutely obligatory character of the language consistently used by the Legislature in denouncing the offense of speeding, we are satisfied that the Legislature intended to and has dispensed with a culpable mental state as an element of the offense.

Id. at 872-73 (emphasis in original). The Court of Criminal Appeals excused proof of intent in a conviction for driving while intoxicated. Ex parte Ross, 522 S.W.2d 214 (Tex.Cr.App.1975). Ross was a criminal action, but the contention in the case was that

article 6.02 of the Revised Penal Code required proof of the culpable state of mind unless the statute expressly excused it. The offense had been codified as

article 802 of the Penal Code, but in 1974 the legislature transferred that statute back to the civil statutes, as it did with

section 16(

b) of

article 911b. The court rejected the contention that intent was an element of the offense, saying: The issue which must be resolved is whether the Legislature through enactment of Sections 6.02 and 1.03(

b) of the new Texas Penal Code intended to require proof of a culpable mental state in the offense of driving while intoxicated. First of all, if such was their intention, it seems strange that they would implement the same in the awkward manner the petitioner suggests. It would have been much easier to merely include the requirement of proof of a culpable mental state by amending the statute when it was transferred from

Article 802, Vernon’s Ann.P.C., to

Article 6701L-1, Vernon’s Ann.C.S. Id. at 218 (emphasis added). A culpable mental state was again excused in a criminal case, subsequent to 1974, notwithstanding the provisions of

article 6.02. In American Plant Food Corp. v. State, 587 S.W.2d 679 (Tex.Cr.App.1979), defendant was assessed a $500 fine for violation of

section 26.212 of the Texas Water Code.

Section 26.213 of the Code provides that violation of the provisions of

section 26.212 is a criminal misdemeanor offense. Defendant therefore argued that

section 6.02 of the Penal Code was applicable and required proof of a culpable mental state. The court held: We, too, are persuaded that the Legislature’s intent in no longer requiring proof of knowledge when it amended the act in 1967 was to create a strict liability standard in which no proof of scienter is necessary. If the Legislature had intended to require proof of a culpable mental state for this crime, it would have been much easier to merely include the requirement by amending the statute when it was transferred to

Section 21.552 of the Water Code in 1971 and when it was retransferred to

Section 26.211 in 1977. ... The concept of strict liability is founded on the premise that the mere doing of the act constitutes the offense and the lack of intent “will not exonerate the party nor does this make the prohibited act any less harmful to society.” [Citations deleted.] The Legislature in eliminating a mens rea element recognized the substantial risks to public health involved in even passive pollution and enacted the penal

section of the Water Code in this manner to further its intent. Id. at 685-86 (emphasis added). See also City of Galveston v. State, 518 S.W.2d 413 (Tex.Civ.App.—Houston [14th Dist.] 1975, no writ) (same result). Civil Penalties May Be Different From Crimes The State proceeded in this case under

section 16(

b) of

article 911b, not under

section 16(a). The legislature manifested an intent that a violation of the Motor Carrier Act could be either a crime or a civil offense or both. If that be not the legislative intent, we attribute to them a useless piece of legislation.

Section 16(

a) is couched in terms of crime. It states that one who violates the proscribed act or failure to act will be “guilty” of a “misdemeanor” and upon “conviction” shall be punished by a “fine,” and that each day’s violation will be a separate “offense.” In contrast with that language,

section 16(

b) states that a violation will subject one to a “penalty” for each day of “violation.” Our statutes are honeycombed with provisions for civil penalties. Depending upon particular legislative history and the wording of the statute, knowledge and intent may be required. See State v. Harrington, 407 S.W.2d 467 (Tex.1966). Ordinarily, however, a civil penalty statute makes no provision for knowledge or intent, and thus does not include culpability as an element. Imposing the requirements of scienter from the criminal law upon such regulatory statutes can undermine their purposes.

That is the rule as to minor crimes, as we have already seen; a fortiori, it would be the rule for the lesser offense of civil penalties. Knowledge and intent were not required in a suit by the State seeking civil penalties against one who violated the Water Well Drillers Act,

article 7621e. See Williams v. State, 514 S.W.2d 772 (Tex.Civ.App.—Beaumont 1974, writ ref’d n. r. e.). This court again addressed the contention that knowledge or intent was necessary in a case to establish the State’s right to recover civil penalties for violations of the deceptive trade practices act,

article 5069,

section 10.-02, in State v. Credit Bureau of Laredo, Inc., 530 S.W.2d 288 (Tex.1975). We there followed the established construction of the Federal Trade Commission Act and held: We disapprove the holding of the court of civil appeals that the State has the burden to prove that Credit Bureau “knowingly” violated the injunction.

Section 10.01 of

article 5069 is the relevant statute, and it does not contain the word “knowingly” or any synonym of that word. State v. Credit Bureau of Laredo, Inc., supra at 293. See also Pennington v. Singleton, 606 S.W.2d 682, 689-90 (Tex.1980). The civil penalties imposed by the Texas usury statutes are severe, but intent to charge usury is not an element of the proof because the statute does not require it. This court in Cochran v.

American Savings and Loan Association of Houston, 586 S.W.2d 849, 850 (Tex.1979), wrote: The subjective intent of the lender is irrelevant if, in fact, the lender has contracted for, charged or received interest on a loan in excess of the maximum permitted by law. The Motor Carrier Act is a comprehensive act that regulates the equipment used and those who haul for hire over the highways of Texas between two incorporated cities. Oil Field Haulers Ass’n v. Railroad Commission, 381 S.W.2d 183, 194 (Tex.1964); Great National Life Insurance Co. v. Chapa, 377 S.W.2d 632 (Tex.1964); New Way Lumber Co. v.

Smith, 128 Tex. 173, 96 S.W.2d 282, 285-86 (1936). Those holding certificates or permits must display them in a conspicuous place on each side of the vehicle in plainly legible print which shows the number of the certificate or permit, the name of the carrier and the unit number of the vehicle. Letters and numbers must be at least two inches high.

Article 911b,

section 18. The evidence of the certificate or permit must therefore be plainly visible to shippers and the public. One who hires a shipper can at once know whether it is lawfully authorized to haul goods for hire. To “hire” means to “procure.” In Mason Feed Store v. Starks, 398 S.W.2d 392 (Tex.Civ.App.—Austin 1966, writ dism’d), a venue case over which this court lacked jurisdiction to review, Mason Feed Store had hired an uncertificated trucker to haul grain. The court held that the Feed Store by so doing, “procured, aided and abetted in the violation of

article 911b.” Accord: U. S. v. Gunn, 97 F.Supp. 476 (W.D.Ark.1950); U. S. v. J and J Truck Leasing, Inc., 258 F.Supp. 105 (D.Kan.1966). The court of civil appeals in this case held that knowledge or intent were required to prove a violation of

section 16(a), the criminal part of

section 16, and that this court had so ruled in Carter v. William Sommerville and Son, Inc., 584 S.W.2d 274 (Tex.1979). This is not a correct reading of Sommerville. Sommerville, unlike this case, was not a suit to recover civil penalties under

section 16(b). That was a death case in which the plaintiff, Carter, relied upon a breach of

section 16(

a) as a basis for negligence per se. This court in Sommer-ville held that

section 16(

a) was not the kind of a crime that states a standard for negligence cases, and it was exclusively upon that basis that it disposed of the case. It disapproved the prior holding in Mason Feed Store v. Starks, supra, which treated a violation of

section 16(

a) as negligence per se. Instead of holding that knowledge and intent were required to prove a violation of

section 16(a), this court expressly reserved that question because it did not reach it. Carter v. William Sommerville and Son, Inc., supra at 279 n.4. The courts below were in error in granting and approving the

summary judgment for the defendant Houdaille. Knowledge or intent are not essential elements to the offense stated in

section 16(b),

article 911b. The judgments of the courts below are reversed and the cause is remanded to the trial court. DENTON, J., dissents in an opinion in which GREENHILL, C. J., and BARROW and CAMPBELL, JJ., join. . All statutory references are-to Tex.Rev.Civ. Stat.Ann. unless otherwise indicated. . Sec. 16. (

a) Every officer, agent, servant or employee of any corporation and every other person who violates or fails to comply with or procures, aids, or abets in the violation of any provision of this Act shall be guilty of a misdemeanor and upon conviction thereof shall be punished by fine not to exceed Five Hundred ($500.00) Dollars, or by imprisonment in the county jail not exceeding one year or by both such fine and imprisonment, and the violations occurring on each day shall each constitute a separate offense. (

b) Any officer, agent, servant or employee of any motor carrier as hereinbefore defined, and any motor carrier as hereinbefore defined, who violates or failes [sic] to obey, observe or comply with any order, decision, rule or regulation, direction, demand or requirement of the Commission, shall be subject to and shall pay a penalty not exceeding Five Hundred ($500.00) Dollars, for each and every day of such violation. Such penalty to be recovered in any court of competent jurisdiction in Travis County, Texas, or in the county in which the violation occurs.

Suit for such penalty or penalties shall be instituted and conducted by the Attorney General of the State of Texas, or by the County or District Attorney in the county in which the violation occurs, in the name of the State of Texas and by direction of the Railroad Commission of Texas. 1929 Tex.Gen.Laws, ch. 314, §§ 16(a-b), at 706. . In 1941,

section 6cc was amended by substituting ten hours for fourteen hours. 1941 Tex. Gen.Laws, ch. 71, § 6, at 86. The statute has not been changed since 1941. . § 6.02. Requirement of Culpability (

a) Except as provided in Subsection (

b) of this section, a person does not commit an offense unless he intentionally, knowingly, recklessly, or with criminal negligence engages in conduct as the definition of the offense requires. (

b) If the definition of an offense does not prescribe a culpable mental state, a culpable mental state is nevertheless required unless the definition plainly dispenses with any mental element. (

c) If the definition of an offense does not prescribe a culpable mental state, but one is nevertheless required under Subsection (

b) of this section, intent, knowledge, or recklessness suffices to establish criminal responsibility. (

d) Culpable mental states are classified according to relative degrees, from highest to lowest, as follows: (1) intentional; (2) knowing; (3) reckless; (4) criminal negligence. (

e) Proof of a higher degree of culpability than that charged constitutes proof of the culpability charged. Tex.Penal Code Ann. § 6.02 (Vernon 1974). . As early as 1933 Sayre assembled this general list of crimes that did not require proof of mens rea:

(1) Illegal sales of intoxicating liquor; (

a) sales of prohibited beverage; (

b) sales to minors; (

c) sales to habitual drunkards; (

d) sales to Indians or other prohibited persons; (

e) sales by methods prohibited by law.

(2) Sales of impure or adulterated food or drugs; (

a) sales of adulterated or impure milk; (

b) sales of adulterated butter or oleomargarine;

(3) Sales of misbranded articles;

(4) Violations of anti-narcotic acts;

(5) Criminal nuisances; (

a) annoyances or injuries to the public health, safety, repose or comfort; (

b) obstructions of highways;

(6) Violations of traffic regulations;

(7) Violations of motor-vehicle laws;

(8) Violations of general police regulations, passed for the safety, health or well-being of the community. Sayre, supra at 73. .

Article 5069, § 10.02 was repealed and reenacted as Tex.Bus.Com.Code Ann. § 17.46 in 1973. . United States v. H. M. Prince Textiles, Inc., 262 F.Supp. 383, 388 (S.D.N.Y.1966) states the rule: [L]ack of willfulness or intention is not a valid defense to an action by the government to recover civil penalties. All that the government need prove is that a cease and desist order has in fact been violated, which has been done in this case. [Citations omitted.] The reason for this is obvious.

A cease and desist order is designed to induce the defendant to rid himself of any business practices which have the capacity to violate the order. The main objective is to insure the protection of the public which must be protected whether the violations are intentional or not. See Standard Distributors v. F. T. C., 211 F.2d 7 (2d Cir. 1954); Parke, Austin & Lipscomb, Inc. v. F. T. C., 142 F.2d 437 (2d Cir. 1944). .

The rapid increase of motor carrier traffic, and the fact that under existing law many motor trucks are not effectively regulated, have increased the dangers and hazards on public highways and make it imperative that more stringent regulations should be employed, to the end that the highways may be rendered safer for the use of the general public; that the wear of such highways may be reduced; that discrimination in rates charged may be eliminated; that congestion of traffic on the highways may be minimized; that the use of the highways for the transportation of property for hire may be restricted to the extent required by the necessity of the general public ....

Tex.Rev.Civ.Stat.Ann. art. 911b, § 22b.