Due to the construction works, traffic restrictions will be applied on the Grand Boulevard, Margit körút and in their surroundings.

From 22 March until circa the middle of May, trams 4 and 6 are running between their South Buda terminuses to Oktogon M during the daytime and replacement buses are in service between Széll Kálmán tér M and Király utca.

At night between 0:00 and 4:00, replacement buses are operating on the full length of route of tram line 6. On certain sections on the Grand Boulevard and Margit körút, a bus lane is designated for tram replacement buses, while on other sections of the route there is a shared lane for buses and cars, therefore there might be heavy traffic in both directions on the route on Margit körút–Tölgyfa utca–Margit híd–Szent István körút–Teréz körút.

Between Széll Kálmán tér and Nyugati tér, traffic lights are reprogrammed providing longer green signals for the traffic. Despite, BKK Centre for Budapest Transport asks you to detour the Grand Boulevard until the middle of May, if it is possible. Please take metro line M2, instead of trams 4 and 6 or if you travel by car, BKK recommends that you go either to Árpád bridge or to Erzsébet bridge, instead of Margit bridge.

Due to the inconvenience caused by the road closures and public transport restrictions, we kindly ask you to be patient. Owing to the results of the current developments, a new, state-of-the-art, well-arranged, accessible green community area with high service level will be created on the premises of the current Széll Kálmán tér. Besides, owing to the coordination of works, public transport in that area will be renewed as a result of the construction of the interconnected tram network in Buda.

On 21 March 2015, complex, coordinated refurbishment and maintenance works started on the routes of tram lines 4 and 6 and along the routes of lines between Széll Kálmán tér and Aradi utca. At Margit híd, budai hídfő, in the surroundings of Keleti Károly utca and Széna tér and at Széll Kálmán tér, there are on-going closures and traffic restrictions due to the track construction of the interconnected tram network in Buda.

In coordination with the construction of the interconnected tram network in Buda, BKV implements urgent track refurbishment on the routes of trams 4 and 6 between Aradi utca and Tátra utca. Due to replacement of tracks constructed in the ‘90s, the speed limit introduced on this section due to the deteriorated conditions of tracks will be lifted. In parallel to these actions, dilatation will be replaced by the executor of the bridge refurbishment (2009–2011) with guarantee.

Refurbishment of Széll Kálmán tér is continued: due to utilities and road construction, on the section of Várfok utca between Vérmező út and Csaba utca, only the lane to Csaba utca will be open to one-way traffic for several months due to construction. Until the middle of April, no further significant changes can be expected in road traffic in the surroundings of Széll Kálmán tér.

Public transport changes:
On the lines of trams 4 and 6
On 21 March 2015 (Saturday) between 04:00 and 24:00, trams 4 and 6 are running on shortened routes between their South Buda terminuses (in case of tram line 4, Újbuda-központ M, while in case of tram line 6, Móricz Zsigmond körtér M) and Blaha Lujza tér M.

Between Széll Kálmán tér M and Blaha Lujza tér M, replacement buses marked with “4-6” are operating on the Grand Boulevard. Also metro line M2 is recommended between Széll Kálmán tér and Blaha Lujza tér.
Replacement buses marked with “4-6” are running from the Széll Kálmán tér M terminus to Blaha Lujza tér M on the same route as trams 4 and 6, serving the following stops:
Széll Kálmán tér: terminus of the former bus 906 on the Margit körút side of Széll Kálmán tér
Széna tér: stop of night bus 960
Mechwart liget: stop of night bus 960
Margit híd, budai hídfő H: in front of Margit körút 2. halfway between Frankel Leó út and Lipthay utca
Margitsziget/Margit híd: on the bridge in front of the access road to Margaret Island
Jászai Mari tér: stop of buses 9, 26, 91, 191 and 226
Nyugati pályaudvar M: stop of bus 9
Oktogon M: stop of night bus 923
Király utca: stop of night bus 923
Wesselényi utca: stop of night bus 923
Blaha Lujza tér M: stop of night bus 923
Replacement buses marked with “4-6” are running from Blaha Lujza tér M terminus to Széll Kálmán tér M on the same route as trams 4 and 6, serving the following stops:
Blaha Lujza tér M: at the taxi rank opposite the Europeum mall on Blaha Lujza tér
Blaha Lujza tér M: stop of night bus 923
Wesselényi utca: stop of night bus 923
Király utca: stop of night bus 923
Oktogon M: stop of night bus 923
Nyugati pályaudvar M: stop of bus 9 and night bus 923
Jászai Mari tér: stop of buses 9, 26, 91, 191 and 226 in front of Szent István körút 6.

At Margitsziget replacement bus to Széll Kálmán tér does not stop

Margit híd, budai hídfő H: stop of buses 91 and 191
Mechwart liget: stop of night bus 960
Széna tér: stop of night bus 960
Széll Kálmán tér M: stop of bus 39
Further public transport changes
Buses 91 and 191
Buses 91 and 191 to Nyugati pályaudvar run on the Fekete Sas utca–Tölgyfa utca route section not serving the section between Rómer Flóris utca and Tölgyfa utca on Margit körút from 21 March (Saturday) for circa two months. Thus, instead of the Margit híd, budai hídfő H stop, please board buses 91 and 191 at the jointly served temporary stop with replacement bus “4-6” situated in front of Margit körút 2. halfway between Frankel Leó út and Lipthay utca.
In the opposite direction, to Királyhágó tér and Sarolta utca, the route of buses 91 and 191 remains unchanged.
Bus 116
Due to the reconstruction works at the junction of Széna tér and Margit körút, the route of bus 116 to Dísz tér will be modified again from 21 March (Saturday) for circa 2 months. The bus will run on a diverted route via Fény utcai piac–Retek utca–Dékán utca–Széll Kálmán tér–Krisztina körút–Vérmező út–Várfok utca to the Bécsi kapu tér stop. As a result the following stops will be served:
Bus 116 will temporarily serve the Széll Kálmán tér (Csaba utca) stop of buses 5, 91 and 102,
The Mátray utca temporary stop will be terminated, bus 116 will serve its original Mátray utca stop.
Changes in night-time public transport services between 21 March and 23 May
Night service on the route of tram 6
From the night of 20/21 March until the night of 22/23 March every night between 00:00 and 04:00 tram replacement bus 6 runs between Móricz Zsigmond körtér M and Széll Kálmán tér M instead of tram 6 on the whole length of its route.
Tram replacement bus 6 will run on the route of tram 6 from Széll Kálmán tér M to Móricz Zsigmond körtér M, and will serve the stops below:
Széll Kálmán tér: terminus of former bus 906 on the Margit körút side of the square,
Széna tér: stop of night bus 960,
Mechwart liget: stop of night bus 960, relocated to Margit körút 54. ahead of the intersection of Erőd utca
Margit híd, budai hídfő H: in front of Margit körút 2. halfway between Frankel Leó út and Lipthay utca

At Nights The Tram Replacement Bus Does Not Serve Its Stop At Margitsziget In Either Direction,

Jászai Mari tér: stop of buses 9, 26, 91, 191 and 226-os,
Nyugati pályaudvar M: stop of bus 9,
Oktogon M: stop of night bus 923,
Király utca: stop of night bus 923,
Wesselényi utca: stop of trams 4 and 6,
Blaha Lujza tér M: stop of trams 4 and 6,
Rákóczi tér M: stop of trams 4 and 6,
Harminckettesek tere: stop of trams 4 and 6,
Corvin-negyed M: stop of trams 4 and 6,
Mester utca/Ferenc körút: stop of trams 4 and 6,
Boráros tér H: stop of trams 4 and 6 in the opposite direction,
Petőfi híd, budai hídfő: stop of trams 4 and 6 in the opposite direction,
Budafoki út/Karinthy Frigyes út: stop of trams 4 and 6 in the opposite direction,
Móricz Zsigmond körtér M.
Tram replacement bus 6 will run on the route of tram 6 from Móricz Zsigmond körtér M to Széll Kálmán tér M, and will serve the stops below:
Móricz Zsigmond körtér M: the terminus of bus 33 on Karinthy Frigyes út,
Budafoki út/Karinthy Frigyes út: stop of bus 33,
Petőfi híd, budai hídfő: stop of trams 4 and 6 in the opposite direction,
Boráros tér H: stop of trams 4 and 6 in the opposite direction,
Mester utca/Ferenc körút: stop of trams 4 and 6,
Corvin-negyed M: stop of trams 4 and 6,
Harminckettesek tere: stop of trams 4 and 6,
Rákóczi tér M: stop of trams 4 and 6,
Blaha Lujza tér M: stop of trams 4 and 6,
Wesselényi utca: stop of trams 4 and 6,
Király utca: stop of night bus 923,
Oktogon M: stop of night bus 923,
Nyugati pályaudvar M: stop of bus 9 and of night bus 923,
Jászai Mari tér: stop of buses 9, 26, 91, 191 and 226 in front of Szent István körút 6,

At Nights The Tram Replacement Bus Does Not Serve Its Stop At Margitsziget In Either Direction,

Margit híd, budai hídfő H: stop of buses 91 and 191,
Mechwart liget: relocated stop of night bus 960 in front of Margit körút 43-45, ahead of the intersection of Keleti Károly utca,
Széna tér: stop of night bus 960,
Széll Kálmán tér M: stop of bus 39.
Further changes in public transport
Night bus 931
Due to the reconstruction works on Margit körút and at Nyugati tér, from the night of 21/22 March for circa 2 months night bus 931 will
run on a diverted route to Árpádföld, serving the following stops:
The temporary Margit híd, budai hídfő H stop in front of Margit körút 2, halfway between Frankel Leó út and Lipthay utca, also served by tram replacement bus 4–6 , buses 91 and 191,
The stop in front of Nyugati tér 6 at the intersection of Bajcsy-Zsilinszky út, behind the taxi rank.
serve the Margit híd, budai hídfő H stop of buses 91 and 191 towards Vereckei lépcső.
Changes in daytime public transport between 22 March and 22 May
Daytime service on the route of trams 4 and 6
From 22 March (Sunday) until 22 May 2015 trams 4 and 6 will run on shortened routes between their terminuses in South Buda (tram 4: Újbuda-központ M; tram 6: Móricz Zsigmond körtér M) and Oktogon M every day between 04:00 and 24:00. Between Széll Kálmán tér M and Király utca stops tram replacement bus 4–6 will run with enhanced frequency, departing every 1–2 minutes in the peak hour. Tram replacement bus will run to Király utca, because this is the only way to provide the shortest walk distance when transferring between the replacement bus and the tram.
Please note that travel time may increase significantly because bus lane will be provided only on some sections of Grand Boulevard. It is recommended to use metro line M2 between Buda and Pest instead.
Tram replacement bus 4–6 will run on the route of tram 4 and 6 from the Széll Kálmán tér M terminus to Király utca and will serve the stops below:
Széll Kálmán tér: the terminus of former bus 906 on the Margit körút side of the square,
Széna tér: stop of night bus 960,
Mechwart liget: stop of night bus 960, relocated to Margit körút 54. ahead of the intersection of Erőd utca,
Margit híd, budai hídfő H: in front of Margit körút 2. halfway between Frankel Leó út and Lipthay utca,

Margitsziget: on the bridge, ahead of the island access road, but only at weekends. On weekdays this stop is skipped

Jászai Mari tér: stop of buses a 9, 26, 91, 191 and 226,
Nyugati pályaudvar M: stop of bus 9,
Oktogon M: stop of night bus 923,
Király utca: stop of night bus 923.
Tram replacement bus 4–6 will run on the route of tram 4 and 6 from Király utca to Széll Kálmán tér M terminus and will serve the stops below:
Király utca: stop of night bus 923,
Oktogon M: stop of night bus 923,
Nyugati pályaudvar M: stop of bus 9 and of night bus 923,
Jászai Mari tér: stop of buses 9, 26, 91, 191 and 226 in front of Szent István körút 6,

The replacement bus towards Széll Kálmán tér does not serve Margitsziget during the day

Margit híd, budai hídfő H: stop of buses 91 and 191,
Mechwart liget: stop of night bus 960,
Széna tér: stop of night bus 960,
Széll Kálmán tér M: stop of bus 39.
Further changes in public transport
Buses 21 and 21A
Due to the road and public utility reconstruction works in Várfok utca, from 23 March (Monday) buses 21 and 21A will depart from the unused terminus of bus 102 in Csaba utca.
Buses 91 and 191
Buses 91 and 191 to Nyugati pályaudvar will run on a route via Fekete Sas utca–Tölgyfa utca, skipping the route section of Margit körút between Rómer Flóris utca and Tölgyfa utca from 21 March (Satruday) for circa 2 months. As a result both lines serve the temporary stop also served by tram replacement bus 4–6 in front of Margit körút 2 halfway between Frankel Leó út and Lipthay utca.
In the opposite direction to Királyhágó utca and Sarolta utca, the route of buses 91 and 191 will not be modified.
Buses serving the Buda Castle
Due to the reconstruction works at the junction of Széna tér and Margit körút, the route of bus 116 to Dísz tér will be modified again from 21 March (Saturday) for circa 2 months. The bus will run on a diverted route via Fény utcai piac–Retek utca–Dékán utca–Széll Kálmán tér–Krisztina körút–Vérmező út–Várfok utca to the Bécsi kapu tér stop. As a result the following stops will be served:
Bus 116 will temporarily serve the Széll Kálmán tér (Csaba utca) stop of buses 5, 91 and 102,
The Mátray utca temporary stop will be terminated, bus 116 will serve its original Mátray utca stop.
The reconstruction of the Széll Kálmán side of the pavement in Várfok utca will start on 23 March (Monday) and will last for circa a few days. For the period of 23–25 March (Monday, Tuesday and Wednesday) the boarding and drop-off point of buses 16 and 16A will be relocated closer to Vérmező út in Várfok utca.
For the period of 26–28 March (Thursday, Friday and Saturday) the terminus of buses 16 and 16A will be relocated to the Krisztina körút–Csaba utca section of Várfok utca. On these days, the buses will reach their original routes after running via Várfok utca–Széll Kálmán téri forduló–Krisztina körút–Vérmező út–Várfok utca. Please note that travel time may increase by a few minutes.
After the completion of the pavement reconstruction, the terminus of buses 16 and 16A will be reinstated to Várfok utca, to the stop of buses 21 and 21A. Buses 16 and 16A will reach their original routes after running via Csaba utca–Krisztina körút–Vérmező út–Várfok utca.

Source: BKK Centre for Budapest Transport