El detective llegó al hotel con el número de la habitación escrito en un papel. El hotel estaba en una calle muy <em>adjetive</em><em> </em>(transitada).
Remember that the impersonal forms are those that do not coincide in <u>gender</u> and <u>number</u> with the subject that performs the action.
<h3>The impersonal forms are: </h3>
Infinitive
Gerund
Participle⇢ In this case.
Remember that the participle is a <u>verbal form</u> while an adjective always <u>describes a quality of the noun</u>, always agreeing in gender and number with the noun it accompanies.