JUSTICE ERICKSON
delivered the opinion of the Court.
We granted certiorari in these cases to consider the constitutional issues that have been raised by the imposition of roadside sobriety tests on persons suspected of driving under the influence of intoxicating liquors or drugs. The central issue presented by each of these cases, which we have consolidated for the purpose of this opinion, is whether a person must be given the warnings directed by
Miranda
v.
Arizona,
384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), prior to a request for submission to a roadside sobriety test. We now reverse the suppression orders issued in
People
v.
Ramirez, People
v.
Luna,
and
People
v. Zepeda,
and affirm the district court’s denial of suppression in
Cordova
v.
District Court, Anderson v. People,
and
Edwards
v.
People.
Because the factual background which created the constitutional issues which are now before us in each of these consolidated cases is similar, we will specifically address only the fact situation presented in
People v. Ramirez.
I.
In the early morning hours of September 20, 1978, a police officer for the City of Aurora observed a car driven by the defendant, Arthur Paul Ramirez, proceeding erratically in a northbound direction on Havana Street. The officer first saw the vehicle strike the curb and then saw it veer across the double yellow line into the southbound lane. Almost immediately thereafter, the vehicle proceeded back across the northbound lanes and struck the curb several more times. At that point, the officer stopped the vehicle and attempted to ascertain the driver’s identity.
The police officer first asked Ramirez to produce his license and registration card. According to the officer’s testimony, Ramirez had difficulty in finding his driver’s license. After smelling a strong odor of an alcoholic
beverage on Ramirez’s breath, the officer asked Ramirez to get out of the automobile. The officer testified that Ramirez had difficulty in walking. Ramirez was then asked if he would take a roadside sobriety test. He consented without reluctance.
Ramirez was first asked to walk heel to toe in a straight line. According to the officer, when Ramirez attempted to walk a straight line, he could only use half-steps and he staggered badly. Thereafter, the officer asked Ramirez to stand on one leg. Again he failed. He could not maintain his balance on one leg. Ramirez was also instructed to place his heels and toes together, to tilt his head back with his eyes closed, and to then touch the tip of his nose with his index finger using his left hand and then his right. He was unable to accomplish the feat and swayed badly. Ramirez was finally asked to stand with his heels and toes together, with his arms relaxed at his side, with his head tilted back and his eyes closed. He could not perform the test and, again, swayed badly. The officer subsequently arrested Ramirez and charged him with driving under the influence of intoxicating alcohol. Section 42-4-1202, C.R.S. 1973. He was not advised of his
Miranda
rights, however, until after he had consented to and performed the roadside sobriety tests.
'
Prior to trial, Ramirez’s counsel moved to suppress the results of the roadside sobriety tests on the grounds that they were taken in violation of the defendant’s
Miranda
rights. The motion was granted by the Arapahoe County Court, and, on the prosecution’s appeal to the district court, the suppression order was affirmed. The prosecution now seeks to determine whether
Miranda
and its progeny require a police officer to give a person a
Miranda
warning prior to a request for performance of a roadside sobriety test.
II.
The primary issue before us involves the Fifth Amendment privilege against self-incrimination. In
Miranda
v.
Arizona,
384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), the Supreme Court thoroughly reviewed the historical and philosophical bases underlying the constitutional privilege against self-incrimination and concluded:
“[T]he [single] constitutional foundation underlying the privilege [against self incrimination] is the respect a government — state or federal — must accord to the dignity and integrity of its citizens. To maintain a ‘fair state-individual balance,’ to require the government ‘to shoulder the entire load,’ [and] to respect the inviolability of the human personality, our accusatory system of criminal justice demands that the government seeking to
punish an individual produce the evidence against him by its own independent labors, rather than by the cruel simple expedient of compelling it from his own mouth. In sum, the privilege is fulfilled only when the person is guaranteed the right ‘to remain silent unless he chooses to speak in the unfettered exercise of his own will.’” (Citations omitted.)
Specifically addressing the admissibility of several inculpatory statements derived from custodial interrogation,
the Court held that an inculpatory statement is constitutionally infirm under the Fifth Amendment unless it can be shown that the defendant had been informed of his constitutional rights prior to being questioned. The
Miranda
warning requires that an accused person who is in custody must be advised, prior to the time that a statement is taken, that he has the right to remain silent, that anything he says can be used against him, that he has the right to an attorney, and that an attorney will be provided to him if cannot afford to hire one.
Presented with a fact situation similar to the one before us, the Supreme Court again reviewed the scope of the Fifth Amendment in
Schmerber
v.
California,
384 U.S. 757, 86 S.Ct. 1826, 16 L.Ed.2d 908 (1966). In
Schmerber,
the defendant was forced to submit to the extraction of a blood sample, which the police then used to determine the level of alcohol in his blood. Rejecting the defendant’s Fifth Amendment challenge to the compelled blood test, the Court held that the privilege only protected the accused from being compelled to testify against himself or to otherwise provide the prosecution with “evidence of a testimonial or communicative nature.” The Court acknowledged that historically the Fifth Amendment privilege had not been given the broad interpretation which the
Miranda
opinion suggested.
The Court stated:
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JUSTICE ERICKSON
delivered the opinion of the Court.
We granted certiorari in these cases to consider the constitutional issues that have been raised by the imposition of roadside sobriety tests on persons suspected of driving under the influence of intoxicating liquors or drugs. The central issue presented by each of these cases, which we have consolidated for the purpose of this opinion, is whether a person must be given the warnings directed by
Miranda
v.
Arizona,
384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), prior to a request for submission to a roadside sobriety test. We now reverse the suppression orders issued in
People
v.
Ramirez, People
v.
Luna,
and
People
v. Zepeda,
and affirm the district court’s denial of suppression in
Cordova
v.
District Court, Anderson v. People,
and
Edwards
v.
People.
Because the factual background which created the constitutional issues which are now before us in each of these consolidated cases is similar, we will specifically address only the fact situation presented in
People v. Ramirez.
I.
In the early morning hours of September 20, 1978, a police officer for the City of Aurora observed a car driven by the defendant, Arthur Paul Ramirez, proceeding erratically in a northbound direction on Havana Street. The officer first saw the vehicle strike the curb and then saw it veer across the double yellow line into the southbound lane. Almost immediately thereafter, the vehicle proceeded back across the northbound lanes and struck the curb several more times. At that point, the officer stopped the vehicle and attempted to ascertain the driver’s identity.
The police officer first asked Ramirez to produce his license and registration card. According to the officer’s testimony, Ramirez had difficulty in finding his driver’s license. After smelling a strong odor of an alcoholic
beverage on Ramirez’s breath, the officer asked Ramirez to get out of the automobile. The officer testified that Ramirez had difficulty in walking. Ramirez was then asked if he would take a roadside sobriety test. He consented without reluctance.
Ramirez was first asked to walk heel to toe in a straight line. According to the officer, when Ramirez attempted to walk a straight line, he could only use half-steps and he staggered badly. Thereafter, the officer asked Ramirez to stand on one leg. Again he failed. He could not maintain his balance on one leg. Ramirez was also instructed to place his heels and toes together, to tilt his head back with his eyes closed, and to then touch the tip of his nose with his index finger using his left hand and then his right. He was unable to accomplish the feat and swayed badly. Ramirez was finally asked to stand with his heels and toes together, with his arms relaxed at his side, with his head tilted back and his eyes closed. He could not perform the test and, again, swayed badly. The officer subsequently arrested Ramirez and charged him with driving under the influence of intoxicating alcohol. Section 42-4-1202, C.R.S. 1973. He was not advised of his
Miranda
rights, however, until after he had consented to and performed the roadside sobriety tests.
'
Prior to trial, Ramirez’s counsel moved to suppress the results of the roadside sobriety tests on the grounds that they were taken in violation of the defendant’s
Miranda
rights. The motion was granted by the Arapahoe County Court, and, on the prosecution’s appeal to the district court, the suppression order was affirmed. The prosecution now seeks to determine whether
Miranda
and its progeny require a police officer to give a person a
Miranda
warning prior to a request for performance of a roadside sobriety test.
II.
The primary issue before us involves the Fifth Amendment privilege against self-incrimination. In
Miranda
v.
Arizona,
384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), the Supreme Court thoroughly reviewed the historical and philosophical bases underlying the constitutional privilege against self-incrimination and concluded:
“[T]he [single] constitutional foundation underlying the privilege [against self incrimination] is the respect a government — state or federal — must accord to the dignity and integrity of its citizens. To maintain a ‘fair state-individual balance,’ to require the government ‘to shoulder the entire load,’ [and] to respect the inviolability of the human personality, our accusatory system of criminal justice demands that the government seeking to
punish an individual produce the evidence against him by its own independent labors, rather than by the cruel simple expedient of compelling it from his own mouth. In sum, the privilege is fulfilled only when the person is guaranteed the right ‘to remain silent unless he chooses to speak in the unfettered exercise of his own will.’” (Citations omitted.)
Specifically addressing the admissibility of several inculpatory statements derived from custodial interrogation,
the Court held that an inculpatory statement is constitutionally infirm under the Fifth Amendment unless it can be shown that the defendant had been informed of his constitutional rights prior to being questioned. The
Miranda
warning requires that an accused person who is in custody must be advised, prior to the time that a statement is taken, that he has the right to remain silent, that anything he says can be used against him, that he has the right to an attorney, and that an attorney will be provided to him if cannot afford to hire one.
Presented with a fact situation similar to the one before us, the Supreme Court again reviewed the scope of the Fifth Amendment in
Schmerber
v.
California,
384 U.S. 757, 86 S.Ct. 1826, 16 L.Ed.2d 908 (1966). In
Schmerber,
the defendant was forced to submit to the extraction of a blood sample, which the police then used to determine the level of alcohol in his blood. Rejecting the defendant’s Fifth Amendment challenge to the compelled blood test, the Court held that the privilege only protected the accused from being compelled to testify against himself or to otherwise provide the prosecution with “evidence of a testimonial or communicative nature.” The Court acknowledged that historically the Fifth Amendment privilege had not been given the broad interpretation which the
Miranda
opinion suggested.
The Court stated:
“It is clear that the protection of the privilege reaches an accused’s communications, whatever form they might take, and the compulsion of
responses which are also communications, for example, compliance with a subpoena to produce one’s papers .... On the other hand, both federal and state courts have usually held that it offers no protection against compulsion to submit to fingerprinting, photographing, or measurements, to write or speak for identification, to appear in court, to stand, to assume a stance, to walk, or to make a particular gesture. The distinction which has emerged, often expressed in different ways, is that the privilege is a bar against compelling ‘communication’ or ‘testimony,’ but that compulsion which makes a suspect or accused the source of ‘real or physical evidence’ does not violate it.”
Thus, since the evidence derived from the blood test was neither the defendant’s testimony nor evidence relating to some communicative act, its admission was not barred by the Fifth Amendment.
Following
Schmerber,
the Supreme Court issued several decisions which further clarified the meaning of the phrase testimonial or communicative nature. In
United States
v.
Wade,
388 U.S. 218, 87 S.Ct. 1926, 18 L.Ed.2d 1149 (1967), the Supreme Court again held that the defendant’s Fifth Amendment rights were not violated. Wade was compelled to utter certain words used by the person who committed a robbery while he was appearing in a lineup wearing a disguise similar to that worn by the robber. The Supreme Court stated:
“We have no doubt that compelling the accused merely to exhibit his person for observation by a prosecution witness prior to trial involves no compulsion of the accused to give evidence having testimonial significance. It is compulsion of the accused to exhibit his physical characteristics, not compulsion to disclose any knowledge he might have .... Similarly, compelling Wade to speak within hearing distance of the witnesses, even to utter words purportedly uttered by the robber, was not compulsion to utter statements of a ‘testimonial’ nature; he was required to use his voice as an identifying physical characteristic, not to speak his guilt.”
Similarly, in
Gilbert v. California,
388 U.S. 263, 87 S.Ct. 1951, 18 L.Ed.2d 1178 (1967), and
United States
v.
Dionisio,
410 U.S. 1, 93 S.Ct. 764, 35 L.Ed.2d 67 (1973), the Supreme Court held respectively that handwriting and voice exemplars may be required without violating the privilege against self-incrimination. In each case, the Supreme Court rejected the argument that the exemplar was communicative or testimonial because neither required the defendant to surrender any knowledge that he might have. Taken together, the cases support the proposition that the broad privilege against self-incrimination announced in
Miranda
must be carefully confined in its application to the realm of coerced confessions and statements.
III.
In light of the Supreme Court’s holdings in
Schmerber
and
Miranda,
we must now determine whether the roadside sobriety test is of
such a nature that it effectively compels a confession from its subject,
or instead, whether it acts merely to compel the exhibition of physical characteristics. At the outset, we note that the courts in a large number of states have considered the issue before us and nearly all have held that the roadside sobriety test does not compel a confession from its subject.
In
Commonwealth
v.
Kloch,
230 Pa. Super. 563, 327 A.2d 375 (1974), for example, a Pennsylvania court aptly declared:
“Requiring a driver to walk in an effort to determine whether he is intoxicated does not violate his privilege against self-incrimination, for the evidence secured is not of a ‘testimonial nature’ .... Rather, the driver is the source of ‘real or physical evidence’ compulsion of which does not come within the scope of the Fifth Amendment.
The Supreme Court of New Hampshire similarly rejected a defendant’s claim that sobriety tests violated his Fifth Amendment rights:
“[Field sobriety tests] are premised upon the relationship between intoxication and the externally manifested loss of coordination which it causes. These tests do not seek to compel from the defendant any knowledge he might have; nor do they involve the defendant’s communicative faculties in any way. They only compel him to exhibit his physical characteristics of coordination. Thus, the field sobriety tests do not constitute testimonial compulsion but are merely a source of real or physical evidence and are not within the privilege against self-incrimination.” (Citations omitted.)
State
v.
Arsenault,
115 N.H. 109, 336 A.2d 244 (1975). We accept these cases as persuasive authority that a roadside sobriety test merely compels
the exhibition of physical characteristics and does not activate the protections afforded by the Fifth Amendment.
While we have not previously addressed the particular issues raised in this case, we recognized in
People v. District Court,
187 Colo. 333, 531 P.2d 626 (1975), that the privilege against self-incrimination does not extend to demonstrative evidence obtained as a result of the performance of acts by the defendant. Moreover, in
Thompson
v.
People,
181 Colo. 194, 510 P.2d 311 (1973), we affirmed a trial court’s ruling that the Fifth Amendment did not bar the admission of motion pictures taken of the defendant while he was undergoing a sobriety test.
See also, Lanford
v.
People,
159 Colo. 36, 409 P.2d 829 (1966). Consistent with the reasoning expressed in those opinions,
we now hold that the privilege against self-incrimination does not extend to the results obtained from a roadside sobriety test.
In reaching our decision, we are mindful of the fact that, although a roadside sobriety test necessarily rests on the subjective observations of the testing officer, it is nonetheless designed to reveal objective information about the driver’s coordinative capabilities. Like the blood test considered in
Schmerber,
a sobriety test is premised on the predictable effects of the consumption of ethyl alcohol:
“Sensitivity is reduced, reaction time is slowed, ability to discriminate is diminished, digital dexterity is reduced, auditory and visual discrimination and judgment fall away, tactile perception is lowered, and speed of motor response drops.”
4 Gray,
Attorney’s Textbook of Medicine,
§ 133.51 (3rd Ed. 1968). The test’s purpose is to obtain tangible evidence of a suspect’s physical condition, and, to that end, the subject is requested to exhibit his body for visual inspection.
In no instance, however, does the test contravene the requirements of the Fifth Amendment by requiring the subject to divulge any knowledge he might have. The fact that the subject’s guilt may be inferred from the results of the test goes to the probity of the testing method, not to its character as a supposed confession surrogate.
In addition, we do not think that a contrary holding is required by the fact that a roadside sobriety test can only be conducted with the
subject’s consent and cooperation.
See Lanford v. People,
159 Colo. 36, 409 P.2d 829 (1966). While it is true that both consent and cooperation are hallmarks of a valid confession under the Fifth Amendment, that fact alone cannot be dispositive of the issue before us. The mere willingness to perform certain acts that may ultimately be of evidentiary significance does not, a priori, convert those acts into communicative or testimonial events.
Rather, the acts must first be classified by their intrinsic nature. The secondary issue of voluntariness then becomes relevant to the question of coercion which must be determined by the appropriate Fourth or Fifth Amendment standard.
Accordingly, the suppression orders in
Ramirez, Luna,
and
Zepeda,
are reversed, and the district court’s denials of suppression in
Cordova, Edwards,
and
Anderson
are affirmed. All of the cases which were consolidated for determination in this opinion are remanded for further proceedings in accordance with the directions contained in this opinion.
JUSTICE GROVES does not participate.