Edit
Edit
August 2025
- MON
- TUE
- WED
- THU
- FRI
- SAT
- SUN
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
Narnaul to Ambala Semi Sleeper Bus
- Goibibo
- Bus Ticket Booking
- Bus from Narnaul to Ambala
- Narnaul to Ambala Semi Sleeper Bus
Showing8 buses
Next Day
Sort by:
BESTRATINGDEPARTUREARRIVALFASTESTCHEAPEST
Narnaul to Ambala Other Buses
Ram Dalal Holidays Pvt Ltd Bharat Benz A/C Seater /Sleeper (2+1) 4.4/5
| 23:10 NH 152 D Narnaul Bypass 4h 20m 03:30 5th Aug T Point Hissar Ambala By Pass | ₹799 | SELECT SEAT 22 window seat 34 seats left ₹ 799 |
| |||
Ram Dalal Holidays Pvt Ltd Bharat Benz A/C Seater /Sleeper (2+1) 4.4/5
| 19:05 NH 152 D Narnaul Bypass 4h 25m 23:30 5th Aug T Point Hissar Ambala By Pass | ₹799 | SELECT SEAT 19 window seat 29 seats left ₹ 799 |
| |||
Hari Das Tour &Travels Bharat Benz A/C Seater /Sleeper (2+1) 4.0/5 | 18:30 NH 152 D Narnaul Bypass 3h 30m 22:00 5th Aug IN STARTING ROAD OF 152 D EXPRESS WAY | ₹799 | SELECT SEAT 17 window seat 27 seats left ₹ 799 |
Hari Das Tour &Travels Bharat Benz A/C Seater /Sleeper (2+1) 4.0/5 | 22:25 NH 152 D Narnaul Bypass 4h 50m 03:15 5th Aug Ambala Cantt | ₹999 | SELECT SEAT 20 window seat 33 seats left ₹ 999 |
Hari Das Tour &Travels Bharat Benz A/C Seater /Sleeper (2+1) 4.0/5 | 18:05 NH 152 D Narnaul Bypass 4h 25m 22:30 5th Aug AMBALA | ₹5000 | SELECT SEAT 22 window seat 38 seats left ₹ 5000 |
GK Travels A/C Seater/Sleeper (2+1) 3.8/5 | 01:25 Narnaul 3h 35m 05:00 5th Aug AMBALA | ₹699 | SELECT SEAT 22 window seat 39 seats left ₹ 699 |
| |||
Vijay Tour and Travels Volvo 9600 Multi-Axle A/C Sleeper (2+1) 3.6/5 | 01:35 Nh-152 ambala cutt 2h 50m 04:25 5th Aug Kaithal bypass t-point,ambala | ₹1199 | SELECT SEAT 26 window seat 42 seats left ₹ 1199 |
| |||
Vijay Tour and Travels Bharat Benz A/C Seater /Sleeper (2+1) 3.6/5 | 03:00 Nh-152 ambala cutt 5h 40m 08:40 5th Aug Ambala cant bus stand | ₹899 | SELECT SEAT 24 window seat 40 seats left ₹ 899 |
|
FAQs About Semi Sleeper Buses from Narnaul to Ambala
Q. How many Semi Sleeper buses currently operating from Narnaul to Ambala?
A. There are 0 Semi Sleeper buses currently running from Narnaul to Ambala currently. Book Now
Q. What is the avg time taken by Semi Sleeper bus for Narnaul Ambala Journey?
A. The time taken for Narnaul to Ambala by Semi Sleeper bus via road travel is around 2h 5m (appx.). Book Now
Q. What is the cheapest bus fare between Narnaul to Ambala Travel on Goibibo?
A. The cheapest bus fare available between Narnaul to Ambala is ₹ 699. Book Now
Q. What are the popular bus operators currently serving buses for Narnaul to Ambala route?
A. Our top bus operators for Narnaul to Ambala bus route are: GK Travels, Hari Das Tour &Travels, Ram Dalal Holidays Pvt Ltd, Vijay Tour and Travels Book Now
Boarding points in Narnaul
- NH 152 D Narnaul Bypass
- Narnaul
- Nh-152 ambala cutt
Dropping points in Ambala
- T Point Hissar Ambala By Pass
- IN STARTING ROAD OF 152 D EXPRESS WAY
- AMBALA
- Ambala Cantt
- Kaithal bypass t-point,ambala
- Ambala cant bus stand
Top routes from Narnaul
- Narnaul to Jammu Bus
- Narnaul to Delhi Bus
- Narnaul to Sri Ganganagar Bus
- Narnaul to Pathankot Bus
- Narnaul to Chandigarh Bus
- Narnaul to Lucknow Bus
- Narnaul to Jodhpur Bus
- Narnaul to Mukerian Bus
- Narnaul to Agra Bus
- Narnaul to Haridwar Bus
- Narnaul to Rudrapur Bus
- Narnaul to Kanpur Bus
- Narnaul to Haldwani Bus
- Narnaul to Udaipur Bus
- Narnaul to Ahmedabad Bus
- Narnaul to Dehradun Bus
- Narnaul to Ludhiana Bus
- Narnaul to Kathgodam Bus
- Narnaul to Panchkula Bus
- Narnaul to Ambala Bus
- Narnaul to Gurgaon Bus
- Narnaul to Bikaner Bus
- Narnaul to Churu Bus
- Narnaul to Firozabad Bus
- Narnaul to Rawatsar Bus
- Narnaul to Hanumangarh Bus
- Narnaul to Jalandhar Bus
- Narnaul to Amritsar Bus
- Narnaul to Noida Bus
- Narnaul to Jhunjhunu Bus
- Narnaul to Nagaur Bus
- Narnaul to Ladnun Bus
- Narnaul to Alwar Bus
- Narnaul to Khimsar Bus
- Narnaul to Ajmer Bus
- Narnaul to Roorkee Bus
- Narnaul to Nimbi Jodha Bus
- Narnaul to Dasuya Bus
- Narnaul to Nathdwara Bus
- Narnaul to Mathura Bus
Top routes to Narnaul
- Delhi to Narnaul Bus
- Jammu to Narnaul Bus
- Zirakpur(Punjab) to Narnaul Bus
- Jaipur to Narnaul Bus
- Jalandhar to Narnaul Bus
- Ludhiana to Narnaul Bus
- Kathgodam to Narnaul Bus
- Gurgaon to Narnaul Bus
- Chandigarh to Narnaul Bus
- Haridwar to Narnaul Bus
- Rudrapur to Narnaul Bus
- Udaipur to Narnaul Bus
- Pathankot to Narnaul Bus
- Agra to Narnaul Bus
- Mukerian to Narnaul Bus
- Lucknow to Narnaul Bus
- Ahmedabad to Narnaul Bus
- Allahabad to Narnaul Bus
- Jodhpur to Narnaul Bus
- Bikaner to Narnaul Bus
- Amritsar to Narnaul Bus
- Dehradun to Narnaul Bus
- Noida to Narnaul Bus
- Sri Ganganagar to Narnaul Bus
- Nathdwara to Narnaul Bus
- Katra to Narnaul Bus
- Roorkee to Narnaul Bus
- Firozabad to Narnaul Bus
- Chirawa to Narnaul Bus
- Jhunjhunu to Narnaul Bus
- Sujangarh to Narnaul Bus
- Rohtak to Narnaul Bus
- Nagaur to Narnaul Bus
- Ladnun to Narnaul Bus
- Alwar to Narnaul Bus
- Ajmer to Narnaul Bus
- Bidasar to Narnaul Bus
- Khimsar to Narnaul Bus
- Nimbi Jodha to Narnaul Bus
- Churu to Narnaul Bus
Top routes to Ambala
- Delhi to Ambala Bus
- Jaipur to Ambala Bus
- Jammu to Ambala Bus
- Gurgaon to Ambala Bus
- Manali to Ambala Bus
- Amritsar to Ambala Bus
- Katra to Ambala Bus
- Kasol to Ambala Bus
- Gorakhpur to Ambala Bus
- Dharamshala to Ambala Bus
- Shimla to Ambala Bus
- Bir(Himachal Pradesh) to Ambala Bus
- Lucknow to Ambala Bus
- Jodhpur to Ambala Bus
- Dehradun to Ambala Bus
- Kangra to Ambala Bus
- Kullu to Ambala Bus
- Kanpur to Ambala Bus
- Noida to Ambala Bus
- Allahabad to Ambala Bus
- Palampur to Ambala Bus
- Basti to Ambala Bus
- Chandigarh to Ambala Bus
- Bhuntar to Ambala Bus
- Jalandhar to Ambala Bus
- Agra to Ambala Bus
- Faizabad to Ambala Bus
- Kathua to Ambala Bus
- Ludhiana to Ambala Bus
- Rawatsar to Ambala Bus
- Bilaspur (Himachal Pradesh) to Ambala Bus
- Mukerian to Ambala Bus
- Phagwara to Ambala Bus
- Samba (Jammu And Kashmir) to Ambala Bus
- Dasuya to Ambala Bus
- Lakhanpur to Ambala Bus
- Pandoh to Ambala Bus
- Beas to Ambala Bus
- Patlikuhal (Himachal Pradesh) to Ambala Bus
- Ner Chowk to Ambala Bus
- Narnaul to Ambala Bus
Top routes from Ambala
- Ambala to Delhi Bus
- Ambala to Jammu Bus
- Ambala to Jaipur Bus
- Ambala to Manali Bus
- Ambala to Katra Bus
- Ambala to Gurgaon Bus
- Ambala to Amritsar Bus
- Ambala to Lucknow Bus
- Ambala to Kasol Bus
- Ambala to Gorakhpur Bus
- Ambala to Shimla Bus
- Ambala to Bikaner Bus
- Ambala to Jalandhar Bus
- Ambala to Dehradun Bus
- Ambala to Jodhpur Bus
- Ambala to Dharamshala Bus
- Ambala to Kangra Bus
- Ambala to Delhi Airport Bus
- Ambala to Kanpur Bus
- Ambala to Ringas Bus
- Ambala to Haldwani Bus
- Ambala to Haridwar Bus
- Ambala to Pathankot Bus
- Ambala to Rudrapur Bus
- Ambala to Palampur Bus
- Ambala to Khatushyamji Bus
- Ambala to Allahabad Bus
- Ambala to Sirsa Bus
- Ambala to Bir(Himachal Pradesh) Bus
- Ambala to Kullu Bus
- Ambala to Kiratpur Sahib Bus
- Ambala to Pandoh Bus
- Ambala to Lakhanpur Bus
- Ambala to Jibhi (Himachal Pradesh) Bus
- Ambala to Patlikuhal (Himachal Pradesh) Bus
- Ambala to Rajpura Bus
- Ambala to Rupnagar Bus
- Ambala to Beas Bus
- Ambala to Ner Chowk Bus
- Ambala to Khanna Bus
- Ambala to Narnaul Bus
Popular cities near Narnaul
- Delhi Bus
- Noida Bus
- Jhunjhunu Bus
- Chirawa Bus
- Gurgaon Bus
- Singhana Bus
- Sikar Bus
- Delhi Airport Bus
- Nawalgarh Bus
- Dharuhera Bus
- Jaipur Bus
- Kotputli Bus
- Shahpura Bus
- Mukandgarh Bus
- Behror (Rajasthan) Bus
- Ambala Bus
- Chandwaji Bus
- Rohtak Bus
- Salasar Bus
- Panchkula Bus
- Chandigarh Bus
- Laxmangarh Bus
- Zirakpur(Punjab) Bus
- Sujangarh Bus
- Churu Bus
- Ladnun Bus
- Alwar Bus
- Nimbi Jodha Bus
- Baggar Bus
Popular cities near Ambala
- Mohali Bus
- Chandigarh Bus
- Panchkula Bus
- Noida Bus
- Delhi Bus
- Panipat Bus
- Karnal Bus
- Faridabad Bus
- Delhi Airport Bus
- Ghaziabad Bus
- Sonipat Bus
- Kurukshetra Bus
- Murthal Bus
- Kharar Bus
- Bilaspur (Himachal Pradesh) Bus
- Sunder Nagar(Himachal Pradesh) Bus
- Jalandhar Bus
- Mandi(Himachal Pradesh) Bus
- Ludhiana Bus
- Phagwara Bus
- Mukerian Bus
- Kiratpur Sahib Bus
- Dasuya Bus
- Rajpura Bus
- Rupnagar Bus
- Pathankot Bus
- Aut Bus
- Amritsar Bus
Top Bus Operators Between Narnaul and Ambala
- Hari Das Tour &Travels Bus
- Ram Dalal Holidays Pvt Ltd Bus
- Vijay Tour and Travels Bus
- INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- GK Travels Bus
- Chandra Travel Singhana Bus
- Gajraj bus service Bus
- PAL BUS(Patel Travels®) Bus
- DEV HIGH SPEED TRAVELS AND CARGO Bus
- RAO SAHAB TRAVELS PVT. LTD. Bus
- Shree Mahaveer Travels Jaipur Bus
- Ram Dalal Holidays Bus
- R.K Jakhar Travels Bus
Top Bus Operators from Narnaul
- Narnaul to Lucknow Vijay Tour and Travels Bus
- Narnaul to Sri Ganganagar Vijay Tour and Travels Bus
- Narnaul to Jammu Vijay Tour and Travels Bus
- Narnaul to Delhi Vijay Tour and Travels Bus
- Narnaul to Delhi Ratan HR Travels Bus
- Narnaul to Pathankot Vijay Tour and Travels Bus
- Narnaul to Jodhpur Shailu Tour and Travels Bus
- Narnaul to Agra Vijay Tour and Travels Bus
- Narnaul to Jammu GK Travels Bus
- Narnaul to Jammu Hari Das Tour &Travels Bus
- Narnaul to Kanpur Vijay Tour and Travels Bus
- Narnaul to Ahmedabad SeemaPooja® Travels Bus
- Narnaul to Udaipur Vijay Tour and Travels Bus
- Narnaul to Kathgodam Vijay Tour and Travels Bus
- Narnaul to Chandigarh Chandigarh Transport Undertaking (CTU) Bus
- Narnaul to Haridwar SHEKHAR TRAVELS Bus
- Narnaul to Delhi R.K Jakhar Travels Bus
- Narnaul to Dehradun SHEKHAR TRAVELS Bus
- Narnaul to Rudrapur Vijay Tour and Travels Bus
- Narnaul to Mukerian Vijay Tour and Travels Bus
- Narnaul to Chandigarh Hari Das Tour &Travels Bus
- Narnaul to Haldwani Vijay Tour and Travels Bus
- Narnaul to Panchkula GK Travels Bus
- Narnaul to Hanumangarh Vijay Tour and Travels Bus
- Narnaul to Chandigarh Ram Dalal Holidays Bus
- Narnaul to Gurgaon Hari Das Tour &Travels Bus
- Narnaul to Pathankot Ram Dalal Holidays Bus
- Narnaul to Chandigarh GK Travels Bus
- Narnaul to Ludhiana Ram Dalal Holidays Bus
- Narnaul to Rawatsar Vijay Tour and Travels Bus
Top Bus Operators to Ambala
- Delhi to Ambala NueGo Bus
- Delhi to Ambala FLIXBUS Bus
- Delhi to Ambala Laxmi holidays Bus
- Jaipur to Ambala Vijay Tour and Travels Bus
- Jammu to Ambala FLIXBUS Bus
- Kasol to Ambala FLIXBUS Bus
- Katra to Ambala FLIXBUS Bus
- Gurgaon to Ambala NueGo Bus
- Dharamshala to Ambala FLIXBUS Bus
- Delhi to Ambala zingbus Bus
- Jaipur to Ambala GK Travels Bus
- Bir(Himachal Pradesh) to Ambala FLIXBUS Bus
- Gorakhpur to Ambala Laxmi holidays Bus
- Manali to Ambala Laxmi holidays Bus
- Amritsar to Ambala INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- Gorakhpur to Ambala GK Travels Bus
- Gurgaon to Ambala Yolo Bus
- Delhi to Ambala INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- Manali to Ambala DELTIN TRAVELS PRIVATE LIMITED Bus
- Bir(Himachal Pradesh) to Ambala Himalayan Nomad Ktc Bus
- Jammu to Ambala Laxmi holidays Bus
- Gorakhpur to Ambala Gajraj bus service Bus
- Jodhpur to Ambala Vijay Tour and Travels Bus
- Gurgaon to Ambala Orbit Aviation Pvt Ltd Bus
- Jodhpur to Ambala SHREE GAJRAJ Travels Bus
- Shimla to Ambala City Land Travels Bus
- Amritsar to Ambala FLIXBUS Bus
- Noida to Ambala FLIXBUS Bus
- Jaipur to Ambala SHREE GAJRAJ Travels Bus
Airport Routes from Ambala
Airport Routes to Ambala
Hotels in Narnaul
Popular Hotels in Ambala
Hotels in Ambala
Semi Sleeper Bus from Narnaul
- Narnaul to Jammu Semi Sleeper Bus
- Narnaul to Delhi Semi Sleeper Bus
- Narnaul to Sri Ganganagar Semi Sleeper Bus
- Narnaul to Pathankot Semi Sleeper Bus
- Narnaul to Chandigarh Semi Sleeper Bus
- Narnaul to Lucknow Semi Sleeper Bus
- Narnaul to Jodhpur Semi Sleeper Bus
- Narnaul to Mukerian Semi Sleeper Bus
- Narnaul to Agra Semi Sleeper Bus
- Narnaul to Haridwar Semi Sleeper Bus
- Narnaul to Rudrapur Semi Sleeper Bus
- Narnaul to Kanpur Semi Sleeper Bus
- Narnaul to Haldwani Semi Sleeper Bus
- Narnaul to Udaipur Semi Sleeper Bus
- Narnaul to Ahmedabad Semi Sleeper Bus
- Narnaul to Dehradun Semi Sleeper Bus
- Narnaul to Ludhiana Semi Sleeper Bus
- Narnaul to Kathgodam Semi Sleeper Bus
- Narnaul to Panchkula Semi Sleeper Bus
- Narnaul to Gurgaon Semi Sleeper Bus
- Narnaul to Bikaner Semi Sleeper Bus
- Narnaul to Churu Semi Sleeper Bus
- Narnaul to Firozabad Semi Sleeper Bus
- Narnaul to Rawatsar Semi Sleeper Bus
- Narnaul to Hanumangarh Semi Sleeper Bus
- Narnaul to Jalandhar Semi Sleeper Bus
- Narnaul to Amritsar Semi Sleeper Bus
- Narnaul to Noida Semi Sleeper Bus
- Narnaul to Jhunjhunu Semi Sleeper Bus
- Narnaul to Nagaur Semi Sleeper Bus
- Narnaul to Ladnun Semi Sleeper Bus
- Narnaul to Alwar Semi Sleeper Bus
- Narnaul to Khimsar Semi Sleeper Bus
- Narnaul to Ajmer Semi Sleeper Bus
- Narnaul to Roorkee Semi Sleeper Bus
- Narnaul to Nimbi Jodha Semi Sleeper Bus
- Narnaul to Dasuya Semi Sleeper Bus
- Narnaul to Nathdwara Semi Sleeper Bus
- Narnaul to Mathura Semi Sleeper Bus
Semi Sleeper Bus to Ambala
- Delhi to Ambala Semi Sleeper Bus
- Jaipur to Ambala Semi Sleeper Bus
- Jammu to Ambala Semi Sleeper Bus
- Gurgaon to Ambala Semi Sleeper Bus
- Manali to Ambala Semi Sleeper Bus
- Amritsar to Ambala Semi Sleeper Bus
- Katra to Ambala Semi Sleeper Bus
- Kasol to Ambala Semi Sleeper Bus
- Gorakhpur to Ambala Semi Sleeper Bus
- Dharamshala to Ambala Semi Sleeper Bus
- Shimla to Ambala Semi Sleeper Bus
- Bir(Himachal Pradesh) to Ambala Semi Sleeper Bus
- Lucknow to Ambala Semi Sleeper Bus
- Jodhpur to Ambala Semi Sleeper Bus
- Dehradun to Ambala Semi Sleeper Bus
- Kangra to Ambala Semi Sleeper Bus
- Kullu to Ambala Semi Sleeper Bus
- Kanpur to Ambala Semi Sleeper Bus
- Noida to Ambala Semi Sleeper Bus
- Allahabad to Ambala Semi Sleeper Bus
- Palampur to Ambala Semi Sleeper Bus
- Basti to Ambala Semi Sleeper Bus
- Chandigarh to Ambala Semi Sleeper Bus
- Bhuntar to Ambala Semi Sleeper Bus
- Jalandhar to Ambala Semi Sleeper Bus
- Agra to Ambala Semi Sleeper Bus
- Faizabad to Ambala Semi Sleeper Bus
- Kathua to Ambala Semi Sleeper Bus
- Ludhiana to Ambala Semi Sleeper Bus
- Rawatsar to Ambala Semi Sleeper Bus
- Bilaspur (Himachal Pradesh) to Ambala Semi Sleeper Bus
- Mukerian to Ambala Semi Sleeper Bus
- Phagwara to Ambala Semi Sleeper Bus
- Samba (Jammu And Kashmir) to Ambala Semi Sleeper Bus
- Dasuya to Ambala Semi Sleeper Bus
- Lakhanpur to Ambala Semi Sleeper Bus
- Pandoh to Ambala Semi Sleeper Bus
- Beas to Ambala Semi Sleeper Bus
- Patlikuhal (Himachal Pradesh) to Ambala Semi Sleeper Bus
- Ner Chowk to Ambala Semi Sleeper Bus
Popular Volvo City Buses
- Kangra Volvo Bus
- Bir(Himachal Pradesh) Volvo Bus
- Pathankot Volvo Bus
- Basti Volvo Bus
- Roorkee Volvo Bus
- Bikaner Volvo Bus
- Dharamshala Volvo Bus
- Katra Volvo Bus
- Zirakpur(Punjab) Volvo Bus
- Kathgodam Volvo Bus
- Jhunjhunu Volvo Bus
- Khimsar Volvo Bus
- Allahabad Volvo Bus
- Phagwara Volvo Bus
- Lakhanpur Volvo Bus
- Amritsar Volvo Bus
- Patlikuhal (Himachal Pradesh) Volvo Bus
- Ludhiana Volvo Bus
- Churu Volvo Bus
- Bilaspur (Himachal Pradesh) Volvo Bus
- Beas Volvo Bus
- Khanna Volvo Bus
- Khatushyamji Volvo Bus
- Jalandhar Volvo Bus
- Ringas Volvo Bus
- Palampur Volvo Bus
- Rohtak Volvo Bus
- Faizabad Volvo Bus
- Kiratpur Sahib Volvo Bus
- Nathdwara Volvo Bus
- Ahmedabad Volvo Bus
- Delhi Volvo Bus
- Alwar Volvo Bus
- Bhuntar Volvo Bus
- Rupnagar Volvo Bus
- Kullu Volvo Bus
- Kasol Volvo Bus
- Rudrapur Volvo Bus
- Mukerian Volvo Bus
- Samba (Jammu And Kashmir) Volvo Bus
- Lucknow Volvo Bus
- Ambala Volvo Bus
- Jammu Volvo Bus
- Haldwani Volvo Bus
- Narnaul Volvo Bus
- Pandoh Volvo Bus
- Rajpura Volvo Bus
- Noida Volvo Bus
- Manali Volvo Bus
- Shimla Volvo Bus
- Jibhi (Himachal Pradesh) Volvo Bus
- Kanpur Volvo Bus
- Panchkula Volvo Bus
- Hanumangarh Volvo Bus
- Ner Chowk Volvo Bus
- Haridwar Volvo Bus
- Jodhpur Volvo Bus
- Sri Ganganagar Volvo Bus
- Gorakhpur Volvo Bus
- Kathua Volvo Bus
- Ajmer Volvo Bus
- Sujangarh Volvo Bus
- Dasuya Volvo Bus
- Firozabad Volvo Bus
- Bidasar Volvo Bus
- Nimbi Jodha Volvo Bus
- Jaipur Volvo Bus
- Udaipur Volvo Bus
- Chandigarh Volvo Bus
- Ladnun Volvo Bus
- Sirsa Volvo Bus
- Gurgaon Volvo Bus
- Mathura Volvo Bus
- Dehradun Volvo Bus
- Rawatsar Volvo Bus
- Chirawa Volvo Bus
- Delhi Airport Volvo Bus
- Nagaur Volvo Bus
- Agra Volvo Bus