Budapest’s Iconic Tram 4-6 Is Getting a Facelift: What Visitors Need to Know

If you’re planning a trip to Budapest between late September and late November 2026, there’s an important change to your city transport routine you’ll want to know about before you set off exploring. Starting September 28, the southern Buda section of tram line 6 is closing for a major two-month renovation, and it’s going to reshape how hundreds of thousands of locals and tourists get around South Buda every single day. Don’t worry, though. The metro, buses, and the rest of the tram network are all still running, and once you understand the changes, navigating around them is genuinely simple.

Why This Tram Line Matters So Much

Trams 4 and 6 together form one of the busiest public transport routes not just in Budapest, but in all of Europe, carrying roughly 300,000 passengers every day. This is the tram that loops around the Grand Boulevard (Nagykörút), connecting some of the city’s most visited neighborhoods, including Astoria, Blaha Lujza Square, and the lively Móricz Zsigmond Circus on the Buda side. Because the tracks handle such relentless daily traffic, Budapest’s transport operator BKV has scheduled a deep structural overhaul of the line’s independent Buda stretch, running along Karinthy Frigyes Road between Irinyi József Street and Bercsényi Street.

This isn’t a simple rail swap. Crews are tearing out roughly 800 meters of old track structure and rebuilding it from the ground up, including a new foundation layer, a load-distributing concrete slab, vibration-dampening rubber padding, and prefabricated reinforced concrete track panels. The rails themselves will be secured using a flexible embedding technique that makes the line quieter and far more durable long-term. Along the way, workers are also replacing about 1,300 cubic meters of asphalt and concrete paving and installing twelve new stormwater drains across six points on the road. It’s a big job, but the payoff is a smoother, quieter, and more reliable ride for years to come.

What Changes for Tourists Getting Around

From September 28 through November 22, tram traffic is suspended entirely on Karinthy Frigyes Road. During this period, trams that normally run the combined 4-6 route on the Grand Boulevard will instead operate purely as tram 4, running between Széll Kálmán Square and Újbuda Center. In practice, this means the tram simply won’t detour onto Karinthy Frigyes Road or reach Móricz Zsigmond Circus via that stretch, though the rest of the Grand Boulevard loop through Pest continues as normal.

Here’s the reassuring part for anyone staying near Móricz Zsigmond Circus, one of Budapest’s key transit hubs and a gateway to sights like the Buda Castle district and the Danube embankment. That square remains fully reachable, just via different routes. Metro line 4 stops directly there, offering a fast connection from Kelenföld all the way to Keleti train station. The trams running along Fehérvári Road also serve the circus, so if you’re coming from that direction, you’re covered without any extra effort.

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For the Budafoki Road and Karinthy Frigyes Road junction specifically, buses 33 and 58 connect you there from Móricz Zsigmond Circus, while buses 107 and 133E reach the same area from the Budafoki Road and Szerémi Row junction. If you’re heading toward the Arany János Street housing estate late at night, bus 958 has been rerouted along October 23rd Street and Fehérvári Road instead of its usual path, stopping at the same spot bus 33 uses in Újbuda Center.

Notably, BKV has decided not to run a dedicated daytime replacement bus specifically for the closed tram section, since the metro and existing tram and bus lines already cover the area well. Overnight, however, a replacement bus does run along the entire tram 6 route, including through Móricz Zsigmond Circus, every night except Friday-to-Saturday and Saturday-to-Sunday, which are typically covered by Budapest’s regular night bus network instead.

Driving in the Area? Plan Ahead

If you’ve rented a car or are getting around by taxi or rideshare, Karinthy Frigyes Road becomes one-way toward Irinyi József Street for the entire construction period, specifically on the stretch between Bercsényi Street and Irinyi József Street. The junction with Budafoki Road stays open to two-way traffic, though limited to a single alternating lane, so expect brief waits there. Several side streets that normally connect through to the Móricz Zsigmond Circus side will be closed off at their junction with Karinthy Frigyes Road and only accessible as dead ends, so don’t be surprised if your GPS suggests a route that no longer works as expected. It’s worth building in a few extra minutes if you’re driving through South Buda during these two months.

Making the Most of Your Visit Anyway

The good news is that none of this should meaningfully disrupt a well-planned Budapest itinerary. Most of the city’s headline attractions, from Buda Castle and Fisherman’s Bastion to the Great Market Hall and the thermal baths, remain just as easy to reach as ever, since metro line 4 and the wider tram and bus network pick up the slack seamlessly. If your hotel or apartment happens to sit right along the affected stretch of Karinthy Frigyes Road, just budget a little extra walking time to the metro or a rerouted bus stop, and you’ll barely notice the difference.

Construction projects like this are a normal part of city life anywhere in the world, and Budapest’s transport authorities have clearly timed this one carefully, scheduling it for autumn specifically because certain rail-building materials need moderate temperatures to set properly, and because summer’s peak tourist crowds and heat would have made the work slower and more disruptive. By choosing this window, the city is aiming to get the job done efficiently while keeping disruption as contained as possible.

So if you’re wandering through South Buda this autumn and notice construction fencing along Karinthy Frigyes Road, now you know exactly what’s happening and, more importantly, exactly how to route around it without losing a minute of sightseeing time.