@ Myster
Thanks for those links. Interesting. From the first one:
Territorial privacy
Video surveillance
Law 207/200517 sets the means of any electronic (including video) surveillance for road safety used by law enforcement agencies.18 The system is limited to specific and determined purposes: catching traffic infractions, traffic control, locating stolen or illegal vehicles, and use as evidence of a crime.19 The installation of the surveillance methods should be directed, as much as possible, to capture images of vehicles.20 Information from the system may be released for didactic and statistical purposes, as long as no individuals or vehicles are identifiable.21 The CNPD published a clarification in response to many inquiries concerning the surveillance.22 The clarification states that according to the law these systems do not need CNPD approval. The equipment should be registered with the CNPD, and the make, model, and serial number of the surveillance equipment used is published on the CNPD website.
In 2006, Law 51/2006 on the use of video surveillance to monitor traffic as well as other incidents entered into force.23 That law grants permission to "Estradas de Portugal" (Roads of Portugal) to install roadway video surveillance equipment in the interests of road safety. All such installation is subjected, however, to the terms of Act No. 67/98, particularly the requirement of prior notification to the CNPD.
In August 2007, Portugal published a new law punishing improper handling of visual data with fines up to EUR 10,000 and directed captured images to be deleted if the threat did not actually materialise.24
In October 2008, three Portuguese cities were authorised to be equipped with CCTV cameras.25
On 14 July 2008, the CNPD issued an opinion on the use of video surveillance and set down conditions, including:
using the system at night if possible, not recording sound, and preventing private houses from being recorded.26
I don't see where it says that cameras can't be used on streets... The issue concerning restrictions seems to be the use that is actually made such images, as it is in many countries.