Understanding and Managing Speed
Proper speed management is one of the most critical skills for a driver. It's not just about adhering to the posted limits; it's about constantly assessing conditions and driving at an 'appropriate speed'. An appropriate speed is one that allows you to maintain full control of your vehicle and react safely to any potential hazards, considering the traffic, the road, the weather, and your own condition.
The Dangers of Inappropriate Speed
Driving at an inappropriate speed, whether above or below the legal limit, is a primary factor in traffic accidents, dramatically increasing the probability of a fatal outcome. Higher speeds have significant negative effects on your driving ability:
- Reduced Visual Field: As your speed increases, your field of vision narrows, creating a 'tunnel vision' effect. This makes it harder to perceive traffic signs, pedestrians, and other hazards in your peripheral vision.
- Increased Reaction and Braking Distances: The faster you go, the more distance you cover before you can react to a hazard (reaction distance) and the more distance your vehicle needs to stop once you apply the brakes (braking distance). Factors like wet roads or heavier loads further increase braking distance.
- Loss of Control: Excessive speed prevents you from controlling the vehicle in an emergency, especially in curves where centrifugal force can push your vehicle outward.
- Increased Fatigue: Driving at high speeds is more mentally demanding and can accelerate the onset of driver fatigue.
Generic Speed Limits by Road Type
Speed limits are established to ensure safety and maintain a smooth flow of traffic. Unless otherwise indicated by signs, the following generic limits apply:
Urban Roads and Through Roads (Travesías)
- 20 km/h: On roads with a single shared platform for the carriageway and pavement.
- 30 km/h: On roads with a single lane for each direction of travel.
- 50 km/h: On roads with two or more lanes for each direction of travel. This limit also applies to 'travesías' (roads that cross through a town).
- 80 km/h: On urban motorways, unless a lower limit is posted.
Interurban Roads (Outside Built-up Areas)
- Motorways and Dual Carriageways:
- Maximum Speed: 120 km/h for passenger cars, motorcycles, light motorhomes (up to 3,500 kg), and pick-ups. 100 km/h for multi-purpose vehicles. 90 km/h for cars towing a trailer.
- Minimum Speed: 60 km/h. Driving below this speed is considered abnormally reduced speed unless justified by traffic or weather conditions.
- Conventional Roads:
- Maximum Speed: 90 km/h for passenger cars, motorcycles, and passenger-car-derived vehicles. 80 km/h for lorries and motorhomes over 3,500 kg.
- Minimum Speed: 45 km/h (half of the generic maximum for cars).
- Unpaved Roads: The maximum speed for all vehicles is 30 km/h.
Specific Vehicle Speed Limits
Certain vehicles have their own specific speed limits regardless of the road type:
- Mopeds and Light Quadricycles: Limited by design to 45 km/h.
- Heavy Quadricycles: Maximum speed of 70 km/h.
- Special Vehicles: Generic maximum of 40 km/h. This is reduced to 25 km/h if they are towing a trailer or do not have brake signalling.
The Overtaking Rule: No Exceptions
Important: Since March 2022, the rule allowing vehicles to exceed the speed limit by 20 km/h to overtake on conventional roads has been eliminated. It is now illegal to exceed the posted speed limit for any reason, including overtaking, on any type of road.
Adapting Speed to Circumstances
Driving within the legal limit does not automatically mean you are driving safely. You must always reduce your speed in response to adverse conditions or specific hazards.
Driving in Curves
To safely navigate a curve and counteract centrifugal force, you must brake and adjust your speed before entering the curve. Maintain a steady speed through the curve and accelerate gently only as you begin to exit it. Never brake sharply while in the middle of a curve.
Adverse Conditions
Always reduce your speed significantly in conditions like heavy rain or thick fog. On wet roads, tyre grip is reduced, and braking distance increases. In fog, you may be justified in driving below the minimum speed limit to match your reduced visibility.
Hazardous Situations
You must moderate your speed and be prepared to stop when approaching:
- Pedestrians on the carriageway, especially vulnerable ones like children or the elderly.
- Stopped buses picking up or dropping off passengers.
- Level crossings and movable bridges.
- Areas where animals may enter the road.
- Buildings with direct access to the road.
- Stopped vehicles on the hard shoulder (outside of built-up areas).
Abnormally Reduced Speed
Driving below the minimum permitted speed for a road without justification is known as abnormally reduced speed. This is dangerous as it obstructs the normal flow of traffic and can cause rear-end collisions. If your vehicle breaks down and you are forced to drive slowly, you must activate your hazard warning lights to alert other drivers.