A yоung woman was killed in a hit-and-run automobile accident in Bridgewater. Three days after the accident, police, without a warrant, seized the a juvenile’s automobile, parked in the driveway of the juvenile’s home, as the *158 automobile involved in the accident. Thereafter, the juvenile was found delinquent on charges of negligent motor vehicle homicide, and motor vehicle homicide while under the influence of alcohol. 1
Prior to trial, the juvenile filed a motion to suppress evidence obtained as a result of the seizure of his automobile. The motion was denied. On appeal, the juvenile argues, as he did at the hearing, that the warrantless seizure of his automobile violated his rights under the Fourth Amendment to the United States Constitution and art. 14 of the Massachusetts Declaration of Rights. 2 We transferred the appeal to this court on our own motion. We conclude that there was no error in the denial of the juvenile’s motion. We affirm the adjudication of delinquency.
1. Facts. The motion judge fоund the following facts. At approximately 6:30 p.m. on February 2, 1987, an eighteen year old woman was hit by an automobile as she walked along Spring Street in Bridgewater. The driver of the automobile did not stop to aid the woman or to identify himself. The woman died the next day as a result of her injuries.
Witnesses at and near the scene told investigating police officers that two automobiles were in the vicinity at the time of the accident. Each witness remembered seeing a white automobile, which some of them speculated might have been a Lincoln. As a result of the witnesses’ statements, police initially focused their efforts on a search for a white Lincoln. One witnеss also recalled a small, black automobile. The police collected paint chips at the scene of the accident; the *159 chips were dark-colored on one side and light-colored on the other.
Three days after the accident Mark Lovell (Lovell), the seventeen year old son of onе of the investigating officers, told the police that an individual named Steve Mason told him (Lovell) that, on the evening of the accident, he (Mason) saw the juvenile driving a small, black automobile toward Spring Street. 3 Lovell further recounted that he spoke to the juvenile the day after the accident. The juvenile told Lovell that the juvenile’s automobile had a new dent in it, that the juvenile did not know how the automobile had been dented, and that the juvenile had been “wasted” the previous evening.
The police subsequently determined that the juvenile owned a black Chevrolet Camaro. The next day, Officer Robert Gray went to the juvenile’s home and saw a black Cаmaro parked in the driveway. From his vantage point in the road, Gray’s view" of the automobile was unobstructed, and the area was well lit. Gray saw damage to the front end of the automobile, on the right side; this damage included “light spots” on the dark paint. Gray then left the area and returned with Officer Scott Lovell. The Camaro had not moved. The two officers viewed the automobile from the same position that Gray had occupied earlier. Shining a spotlight on the automobile, Officer Lovell observed front end damage.
More officers arrived on the scene. A number of them went on to the driveway of the juvenile’s home. The officers examined the exterior of the automobile. They found chipped paint, fabric fibers embedded in the paint around the right headlight, a dent in the hood and one in the roof, and fabric fibers at the right edge of the roof. The paint on the automobile was black, but the layer underneath was light in color.
*160 The police sergeant in charge of the investigаtion then ordered his officers to seize the automobile to preserve evidence. The police notified the juvenile’s parents, who apparently were home at the time, thát the juvenile should report to the police station. The police then obtained a search warrant. 4 The police subsequently removed paint chips, fragments, and fibers from the exterior of the Camaro and sent them to the State police laboratory for analysis.
2.
The search.
The juvenile does not contest that the police officers were within their legal rights to inspect the automobile from the road. There is no search in the constitutional sense if a police officer, from a position in which he is legally entitled to be, observes incriminating evidence in plain view. “[Tjhere is no reason [the police officer] should be precluded from observing as an officer what would be entirely visible to him as a private citizen.”
Commonwealth
v.
Sergienko,
When the police officers entered on the private driveway, they inspected the exterior without a warrant. Thаt action violated no “expectation of privacy . . . ‘which society could recognize as reasonable.’ ”
Simmons, supra
at 48, quoting
*161
Commonwealth
v.
Cadoret,
In
Simmons
we said that no reasonable expectation of privacy was frustrated where a rape victim was brought by police onto a private, residential driveway to view the exterior and visible interior of the defendant’s automobile. We based our conclusion on “both . . . the Fourth Amendment and art. 14 [of the Massachusetts Declaration of Rights].”
Simmons, supra
at 51. In
Simmons,
as in the case at bar, the automobile was parked in a private driveway; the driveway and the automobile on it were clearly visible from a public way; the driveway was the normal route by which to approach the front door of the residence; no intrusion into the automobile was required; there was a garage at the end of the driveway, but the defendant did not use it; and the owner of the automobile had taken no other steps to conceal the parked automobile from public view.
Id.
at 46-47. “A driveway is only a semi-private area.”
Id.
at 48, quoting
United States
v.
Magana,
3.
The seizure.
The warrantless seizure “invade[d] the [juvenile’s] possessory interest” in his automobile in a way that the search did not.
Horton
v.
California,
“Probable causе exists where ‘the facts and circumstances within . . . [the officers’] knowledge and of which they had reasonably trustworthy information [are] sufficient in themselves to warrant a man of reasonable caution in the belief that’ an offense has been or is being committed.”
Brinegar
v.
United States,
The Commonwealth also must establish that the police were faced with some recognized exception to the warrant requirement — in this case, exigent circumstances. The inherent mobility of an automobile can supply the exigency required to justify a warrantless search and seizure on probable cause. See
Chambers
v.
Maroney,
*164
Relying on contentions similar to those accepted in
Coolidge v. New Hampshire,
The juvenile asserts that the mobility of the automobile cannot supply the requisite exigency because he had four days from the dаte of the accident to destroy or relocate the evidence and did not do so. The juvenile contends further that there was no evidence that he or anyone connected to him was aware that the police were interested in his automobile. This argument is unpersuasive. First, the juvenile was not in custody, and the pоlice had no idea of his'whereabouts. Second, the mere presence of the automobile in the driveway does not establish that the juvenile did not intend *165 to move it. Even if he had not planned to relocate the Camaro, the juvenile could have changed his plans. The police, therefore, were justified in their concern that the automobile might be moved at any moment.
The juvenile also contends that the police could have posted a guard while officers left to apply for a warrant. That argument has been rejected by the United States Supreme Court. “For constitutional purposes, we see no difference betweеn on the one hand seizing and holding a[n automobile] before presenting the probable cause issue to a magistrate and on the other hand carrying out an immediate search without a warrant. Given probable cause to search, either course is reasonable under the Fourth Amendment.”
Cardwell, supra
at 594, quoting
Chambers
v.
Maroney, supra
at 52. See
United States
v.
Evans,
“The leeway now allowed the police to conduct immediate searches of automobiles in lieu of holding them pending a warrant ... is based on Supreme Court cases emphasizing the special nature of automobiles and the lesser expectation of privacy one may have with respect to them” (citations omitted).
Commonwealth
v.
Hall,
*166
Finally, the juvenile argues that the Commonwealth cаnnot claim exigent circumstances in this case because, according to the juvenile, the one-day delay in obtaining a warrant constituted “deliberate and unreasonable delay.”
Commonwealth
v.
Forde,
The adjudications of delinquency are affirmed.
So ordered.
Notes
Although the juvenile also was charged with leaving the scene of an accident resulting in personal injury, the jury determined that this charge was not proved.
Article 14 “may afford greater protections to a person in certain circumstances than those requirеd by Federal decisions interpreting the Fourth Amendment.”
Commonwealth
v.
Simmons,
The judge found that it was Mark Lovell who saw the juvenile driving a black automobile toward Spring Street near the time of the accident. The Commonwealth concedes that Mason told Lovell that Mason made the observations.
At oral argument, the Commonwealth conceded that the warrant, obtained after the seizure of the automobile, was of no effect. A warrant cannot retroactively justify а prior search or seizure that is unconstitutional. Cf.
United States
v.
Guarino,
One of the juvenile’s arguments merits brief discussion. The juvenile contends that the driveway in Simmons abutted a major roadway and a рublic parking area. The police, however, have a right to be on any public way — regardless of its size or volume of traffic. Likewise, an individual who lives on a relatively small public road has no greater expectation of privacy than one who lives on a large public road. Absent some effort to conceal the driveway from public view, the relative seclusion of the neighborhood does not heighten an individual’s expectation of privacy in a driveway.
In his suppression motion below, the juvenile argued that the information supplied by Lovell could not be used to support a determination of probable cause becаuse it lacked the requisite indicia of reliability. The juvenile does not argue that issue on appeal. It is, therefore, deemed waived. See
Commonwealth
v.
Cundriff,
Federal courts, as well as State courts, generally apply the automobile doctrine to unattended, parked automobiles — especially where the police аre uncertain of the owner’s whereabouts. See, e.g.,
United States
v.
Muhammad,
In Coolidge, the Supreme Court held unconstitutional the warrantless seizure of two automobiles from a private driveway. The case since has been overruled on grounds not directly relevant here by Horton, supra (no inadvertence required for application of plain view exception to warrant requirement).
Later cases also suggest that the
Coolidge
court took an overly narrow view of the automobile exigency doctrine. See
Cardwell, supra,
at 594 (that defendant’s automobile was seized in public parking lot, while defendant was in police custody, does not diminish exigency). See also
California
v.
Carney,
Courts generally require that police secure residences by posting guards rather thаn searching immediately on obtaining probable cause. See
Commonwealth
v.
Hall,
