
Why Is the M25 the Busiest Motorway in England?
England, europe
188 km
N/A
moderate
Year-round
Located in London, the capital of England, the M25 is an orbital motorway that almost completely encircles the country’s largest city. Officially known as the London Orbital Motorway, it is one of the busiest and most controversial roads in the United Kingdom. Loved by very few but used by millions, the M25 is essential for London’s transport network, linking counties, cities, airports, and major routes across the southeast of England.
The M25 is a 188 km (117 miles) long motorway, forming a near-complete circle around Greater London. It is one of the world’s largest orbital roads, connecting key motorways and A-roads that lead into the city. Its official designation is the London Orbital Motorway, though drivers know it simply as the M25.
The M25 was part of the ambitious Ringways Scheme, a plan from the 1960s to build several concentric motorways around London. Much of the scheme was cancelled due to protests, funding problems, and controversy. However, sections already under construction were connected together, creating the motorway we know today.
Construction began in 1975, and the motorway was officially completed in 1986, opened by Prime Minister Margaret Thatcher. At the time, it was designed to handle around 100,000 vehicles per day. Today, traffic has doubled in some stretches, with over 200,000 vehicles per day recorded between certain junctions.
The motorway is often described as Britain’s busiest and most disliked road. It is a vital link not only for Londoners but also for travelers heading to destinations such as Heathrow Airport, Gatwick Airport, or popular attractions like the Harry Potter Studios in Leavesden. Its strategic role means that locals, tourists, and freight transport all rely heavily on it.
Yes. As a major motorway, the M25 is fully paved and open year-round, although congestion is frequent. It is often jokingly referred to as “Britain’s biggest car park” due to its notorious traffic jams. To manage the flow, variable speed limits and traffic management systems were introduced, particularly in the 1990s and 2000s.
Despite its bad reputation, the M25 is crucial for the UK’s economy and mobility. It links together several motorways, connects key counties, and allows for the movement of goods and people around London without having to pass through the city itself. It remains a symbol of both modern engineering and modern frustration.Road suggested by: Derncho74 // Lankyyy Gaming
Embark on a journey like never before! Navigate through our interactive map to discover the most spectacular roads of the world
Drive Us to Your Road!
With over 13,000 roads cataloged, we're always on the lookout for unique routes. Know of a road that deserves to be featured? Click here to share your suggestion, and we may add it to dangerousroads.org.
Where is it?
Why Is the M25 the Busiest Motorway in England? is located in England (europe). Coordinates: 54.1022, -2.0023
Road Details
- Country
- England
- Continent
- europe
- Length
- 188 km
- Difficulty
- moderate
- Coordinates
- 54.1022, -2.0023
Related Roads in europe
moderateCol de la Forclaz in Martigny: A Scenic Mountain Pass in Switzerland's Valais Canton
🇨🇭 Switzerland
# Col de la Forclaz: A Swiss Alpine Adventure If you're looking for a serious mountain road experience, Col de la Forclaz is calling your name. Sitting pretty at 1,532 meters (5,026 feet) in the Valais region of Switzerland, this pass has been turning heads—and challenging drivers—for nearly two centuries. Here's the cool part: this route actually has some serious history. Back in the day, smugglers and mule teams used it to cross between Martigny and France. The pass got its first tunnel in 1836 (upgraded in 1905), and it wasn't until 1920 that regular folks in cars could even use it. Before that? Public transport only. Talk about exclusive! The 21.5-kilometer (13.35-mile) stretch from the French border up to Martigny-Combe is fully paved and beautifully maintained, winding through some truly spectacular Alpine scenery. The road hugs the northern edge of the Massif du Mont Blanc, treating you to views that make the drive itself part of the reward. There's even a hotel-restaurant at the summit—been there since around 1830—so you can take a breather at the top. Now, let's talk about what makes this pass legendary: it's a Tour de France staple for a reason. Those steep sections? They hit 11.1% gradient in places, which means this isn't exactly a leisurely cruise. It's demanding, exhilarating, and absolutely worth the effort. **Fair warning:** Winter can shut this road down without notice. Snow chains or winter tires aren't optional—they're essential for safe passage during the colder months.
hardCabeza de Manzaneda
🇪🇸 Spain
# Cabeza de Manzaneda: Spain's Epic Mountain Challenge Nestled in the rugged mountains of Ourense province in Galicia, Cabeza de Manzaneda rises dramatically to 1,751 meters (5,744 feet) above sea level. This isn't just any peak—it's a legendary playground for serious cyclists and road-trippers alike. The paved road to the summit is no joke. We're talking genuinely steep sections that hit 13.6%, so bring your granny gear if you're pedaling up here. But the payoff? You'll find a bar and restaurant waiting at the top, plus several telecommunications towers offering panoramic views of the surrounding landscape. This route has serious cycling credentials—it's been featured in the prestigious Spanish Vuelta a España race, which tells you everything you need to know about its difficulty and prestige. You've got three different routes to choose from depending on where you start: **From Parada de Trives:** The longest haul at 29 km with 1,481 meters of elevation gain. The grades average a manageable 5.1%, making this the gentlest option. **From Manzaneda:** The shortest distance at 22 km, but don't be fooled—you're climbing 1,418 meters with an average gradient of 6.4%. This one's punchy. **From Puente Bibel:** The sweet spot at 30.5 km and 1,425 meters of elevation with a more forgiving 4.7% average grade. Pick your poison and get ready for an unforgettable mountain experience.
hardCol Margherita
🇮🇹 Italy
# Col Margherita: A High-Alpine Adventure in the Dolomites Ready for an unforgettable mountain experience? Col Margherita sits pretty at 2,524m (8,280ft) on the border between Trentino-South Tyrol and Veneto, and it's arguably one of the Dolomites' most stunning viewpoints. Getting to the summit is definitely an adventure. The road is rough and rocky—basically a gravel trail that doubles as a ski-station service road. Thanks to its steep grades (we're talking 30% inclines in some spots), this route demands respect and careful driving. Loose stones and jagged rocks make up much of the track, especially as you climb higher, and the narrow window for tackling it safely means you're really only looking at late August for optimal conditions. The views? Absolutely worth it. At the top, you'll find a little bar waiting to welcome you, and the panoramas across the Bocche ridge—that dramatic ridge separating the San Pellegrino and Travignolo valleys—are genuinely breathtaking. But here's the reality check: this isn't a leisurely drive. Mother Nature rules here with fierce winds that howl year-round and weather that can change in a heartbeat. Pack layers, because temperatures swing wildly, and winter gets *brutally* cold. The exposure is real, and high winds are basically part of the deal at this elevation. If you're an experienced driver who loves mountain challenges and doesn't mind braving the elements, Col Margherita offers an exhilarating slice of alpine magic.
hardPasso del Scengio
🇨🇭 Switzerland
# Passo del Scengio Ready for a serious alpine adventure? Passo del Scengio sits at a pretty impressive 2,215 meters (7,267 feet) in the Viamala Region of Graubünden, Switzerland—and trust me, getting there is half the experience. Fair warning: this isn't your typical Sunday drive. The road climbs as a rough gravel and rocky track that's decidedly narrow and steep, and honestly, the condition has deteriorated so much that it's now closed to regular vehicles. You'll need serious clearance and genuine off-road skills to tackle this one. But here's what makes it special—as you wind your way up, you'll spot fascinating remnants from old dam and tunnel construction projects scattered along the route. It's like stumbling through industrial history while surrounded by stunning alpine scenery. If you're the type who loves exploring forgotten infrastructure and don't mind a challenging drive through dramatic mountain terrain, Passo del Scengio is definitely worth adding to your bucket list.