Opinion by
Senior Judge Kalish,Raymond Wysoeki appeals to this court from the order of the Court of Common Pleas of Northampton County upholding the suspension of his operating privileges pursuant to Section 1547 (b) of the Vehicle Code, 75 Pa. C. S. §1547 (b), for refusing to submit to a breathalyzer test. We affirm.
The trial court found that Pennsylvania State. Troopers were conducting a traffic check by stopping vehicles going in both directions on a road; that when the appellant’s vehicle was stopped, a trooper noticed the odor of an alcoholic beverage on the appellant’s breath; that he .fumbled in producing his *44driver’s license; that on the spot he was asked to walk a straight line, heel to toe, and to stand on one foot for thirty seconds. The appellant failed both tests; The‘ trial court found further that all cars going in both directions on the highway were methodically stopped in the traffic chéek, until all troopers became occupied and, thereafter, all cars not already stopped were allowed to pass undisturbed. The appellant was then placed under arrest and, after being given proper explanations of the law, he refused to take the breathalyzer test.
, Our scope of review is limited to determining whether the record supports by substantial evidence the factual findings of the court below, whether there was an error of law and whether any constitutional rights were violated. Bruno v. Department of Transportation, Bureau of Traffic Safety, 54 Pa. Commonwealth Ct. 353, 422 A.2d 217 (1980). Our cases have consistently held that a. traffic stop is not an arrest, nor is a person so stopped in “custody.” It is not an arrest in the strict sense and when the driver refuses to submit to the breathalyzer test, the driver’s license may be suspended. Glass v. Department of Transportation, Bureau of Traffic Safety, 460 Pa. 362, 333 A.2d 768 (1975); Gresh v. Department of Transportation, Bureau of Traffic Safety, 76 Pa. Commonwealth Ct. 483, 464 A.2d 619 (1983); Corry v. Commonwealth, 59 Pa. Commonwealth Ct. 324, 429 A.2d (1981).
In the Glass case, the Pennsylvania Supreme Court was interpreting the word “arrest” as found in section 624-1 of the Vehicle Code,1 which is now section 15.47(b) of .the Vehicle Code. The court concluded *45•that the word arrest, as used in section 624.1, did not mean a “lawful arrest” as that term is used in our criminal ease law and statutes, and that the legislature was referring merely to the physical • act of arrest. This is why the Supreme Court said it was not concerned with whether the “arrest” was a “lawful arrest.” • *
"■ Under the circumstances in Glass, there wa,s rio constitutional challenge. But, at the same time, the Supreme Court did recognize that the suspension of lieénses by state action may involve constitutional guarantees. The Glass court stated, “we do not believe this position is in any way inconsistent with the judicially determined policy to exclude the admission into evidence of the fruits of an illegal arrest.” Glass, 460 Pa. at 369, 333 A.2d at 771.
The appellant contends that his stop, ab initio, was an invasion of his reasonable expectation of privacy, in violation of the Fourth Amendment to the United States Constitution, and that this violation tainted the Department of Transportation’s subsequent evidence of driving while intoxicated.
The appellant concedes that if the original stop were constitutionally permissible, the poison fruit doctrine of taint would not apply, and that the elements making up probable cause for the request of the chemical test being in plain view were legally sufficient , to constitute, reasonable grounds for the arrest.
In Delaware v. Prouse, 440 U.S. 648 (1979), the Supreme Court of the United States said that what •makes unconstitutional the stopping of a vehicle for a license check is the unconstrained exercise of discretion by a police officer in stopping the vehicle. Only those checks that are regular, methodical and leave nothing to the discretion-of • the checking police of*46ficer are constitutionally permissible. The reason is that pursuant to the Fourth Amendment, a driver has a reasonable expectation of a certain amount of privacy against unreasonable stops, searches and seizures. Where the trooper is given unrestrained discretion as to whom to stop, it would be an unreasonable intrusion of the right of the driver’s reasonable expectation of privacy. Commonwealth v. Long, 489 Pa. 369, 414 A.2d 113 (1980); Commonwealth v. Murray, 460 Pa. 53, 331 A.2d 414 (1975).
We conclude from an examination of the record that the findings of the trial court are supported by substantial evidence, that no error of law was committed and that the appellant’s constitutional rights were not violated because the traffic cheek was made pursuant to the standards set down in the Prouse case. Accordingly, we affirm.
Order
The order of the Court of Common Pleas of Northampton County, entered at Civil Division No. 1983-C-7720 on January 12,1984, is affirmed.
Act of April 29, 1959, P.L. 58, as amended, added by Section 1 of the Act of July 28, 1961, P.L. 918, formerly 75 P.S. §624.1, repealed by the Act of June 17, 1976, P.L. 162.