Driving in the left lane in Portuguese towns is not always illegal: what does the Highway Code say?

Read the two lane rules together

Keeping right is the general rule. Article 13 of the Código da Estrada requires traffic to use the rightmost lane where there are two or more lanes in the same direction. Another lane may be used when there is no room in the rightmost lane, or to overtake or change direction.

Article 14(2) sets a specific criterion for multi-lane roads within built-up areas: use the lane most suitable for your destination. A change to another lane is permitted, after taking the necessary precautions, to change direction, overtake, stop or park. Highway Code, Articles 13 and 14.

What does “within a town” mean legally?

Article 1 defines localidade as an area with buildings whose boundaries are marked by the prescribed signs. Being inside a municipality’s administrative boundary, or seeing “Lisbon” on a navigation screen, does not by itself establish that status. Read the signs marking entry to and exit from the built-up area.

The Code also distinguishes via de trânsito, a lane for one line of vehicles, from faixa de rodagem, the carriageway. Here, “left lane” means a lane travelling in your direction. Driving on the side reserved for opposing traffic is a different offence. Articles 1 and 13(5).

A motorway, or a signed road reserved for cars and motorcycles to which motorway rules apply, does not become an ordinary town avenue simply because it crosses an urban area. Check the road classification and signs; do not treat Article 14 as permission to stay left on every ring road.

Four everyday examples

When the right-hand queue moves faster

Article 42 makes an important distinction. In the situations covered by Article 14(2), the roundabout provisions of Article 14-A, or parallel queues under Article 15, one line of vehicles moving faster than another is not classified as overtaking for the purposes of the Code. A right-hand line advancing in its own lane is therefore not always unlawful overtaking on the right. Article 42.

This does not authorise weaving between vehicles. For an actual overtaking manoeuvre, the general rule is to pass on the left, with specific exceptions in Article 37. ACP’s overtaking guide also explains relevant safety conditions.

In the dense parallel-queue conditions defined by Article 15, drivers cannot leave their queue for one farther right except to change direction, stop or park. Repeatedly switching queues to gain a few places is a different action.

Signals, markings and roundabouts

Choosing a lane for your destination does not override signs. Under Article 7, instructions conveyed by traffic signs take precedence over general traffic rules. Signal before moving, check mirrors and blind spots, and leave a safe gap. Articles 21 and 35 require proper signalling and safe manoeuvres; indicating does not give you priority. Signs and manoeuvring provisions.

Roundabouts have their own rules in Article 14-A: use the right lane for the first exit; for later exits, move progressively right after passing the exit immediately before yours, taking the necessary precautions. Special provisions apply to heavy vehicles, bicycles and other groups specified in the article. Do not cut directly across from an inner lane to the exit.

Fines and the classification of the offence

Money is not the only possible consequence. Breaches of road-position and lane-change rules can be grave (serious) under Article 145(1)(f), and muito grave (very serious) on motorways and equivalent roads under Article 146(h). The corresponding ordinary framework is a one-month to one-year, or two-month to two-year driving disqualification, respectively, with two or four points deducted for these offences after the decision becomes final. The actual sanction depends on the conduct established and its legal classification. Articles 145–148.

A short driving checklist

If you miss your lane, take a safe alternative route instead of making a sudden correction. This is PTNewsHub’s practical driving advice.

PTNewsHub note: the conditions matter

The useful conclusion is that the Code has a destination-based lane rule within built-up areas, alongside rules on road classification, signs, safe manoeuvres and particular traffic situations. When assessing a penalty notice, read the cited provision and the circumstances; the words “left lane” alone do not settle the issue.