Edit
Edit
March 2026
- 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
Ludhiana to Lucknow AC Seater Sleeper Bus
- Goibibo
- Bus Ticket Booking
- Bus from Ludhiana to Lucknow
- Ludhiana to Lucknow AC Seater Sleeper Bus
View More
Showing8 buses
Previous DayNext Day
Sort by:
BESTRATINGDEPARTUREARRIVALFASTESTCHEAPEST
| Bus Details | Time and Duration | Price | |
|---|---|---|---|
INDO CANADIAN® EXPRESS (Luxury Intercity Service) Bharat Benz A/C Seater /Sleeper (2+1) 4.5/5 21 Reviews | 17:20 Samrala Chowk 16h 15m 09:35 23rd Mar Alambagh | ₹1024 ₹1205 | SELECT SEAT 20 window seat 36 seats left ₹ 1205 ₹ 1024 |
| |||
INDO CANADIAN® EXPRESS (Luxury Intercity Service) Bharat Benz A/C Seater /Sleeper (2+1) 4.6/5 21 Reviews | 20:55 Samrala Chowk Opp Gurdawara 15h 35m 12:30 23rd Mar Transport Nagar | ₹948 ₹1115 | SELECT SEAT 22 window seat 38 seats left ₹ 1115 ₹ 948 |
| |||
INDO CANADIAN® EXPRESS (Luxury Intercity Service) Bharat Benz A/C Seater /Sleeper (2+1) 4.5/5 | 14:30 Samrala Chowk Opp Gurdawara 15h 50m 06:20 23rd Mar Alambagh | ₹889 ₹1046 | SELECT SEAT 20 window seat 32 seats left ₹ 1046 ₹ 889 |
| |||
INDO CANADIAN® EXPRESS (Luxury Intercity Service) Bharat Benz A/C Seater /Sleeper (2+1) 4.5/5 | 06:00 Rara Sahib Market Near Regenta Central Klassik 15h 45m 21:45 23rd Mar Transport Nagar Metro Station Gate No.2 | ₹609 ₹716 | SELECT SEAT 16 window seat 26 seats left ₹ 716 ₹ 609 |
| |||
INDO CANADIAN® EXPRESS (Luxury Intercity Service) Bharat Benz A/C Seater /Sleeper (2+1) 4.5/5 | 12:00 Samrala Chowk Opp Gurdawara 16h 0m 04:00 23rd Mar Alambagh | ₹889 ₹1046 | SELECT SEAT 19 window seat 31 seats left ₹ 1046 ₹ 889 |
| |||
GK Travels Bharat Benz A/C Seater /Sleeper (2+1) 3.9/5 81 Reviews | 15:00 Ludhiana Bypass 14h 45m 05:45 23rd Mar Nahariya-Avadh Chowraha | ₹999 | SELECT SEAT 32 window seat 51 seats left ₹ 999 |
| |||
Mahalaxmi Travels Bharat Benz A/C Seater /Sleeper (2+1) 3.2/5 57 Reviews | 18:00 Charanpreet Market Jawahar Nagar camp Near Main Bus Stand 17h 0m 11:00 23rd Mar Transport Nagar | ₹899 | SELECT SEAT 14 window seat 23 seats left ₹ 899 |
| |||
Gajraj bus service Bharat Benz A/C Seater /Sleeper (2+1) 2.3/5 | 14:40 Ludhiana Bypass 14h 45m 05:25 23rd Mar Alambagh | ₹1599 | SELECT SEAT 23 window seat 40 seats left ₹ 1599 |
|
FAQs About AC Seater Sleeper Buses from Ludhiana to Lucknow
Q. How many AC Seater Sleeper buses currently operating from Ludhiana to Lucknow?
A. There are 8 AC Seater Sleeper buses currently running from Ludhiana to Lucknow currently. Book Now
Q. What is the avg time taken by AC Seater Sleeper bus for Ludhiana Lucknow Journey?
A. The time taken for Ludhiana to Lucknow by AC Seater Sleeper bus via road travel is around 14h 45m (appx.). Book Now
Q. What is the cheapest bus fare between Ludhiana to Lucknow Travel on Goibibo?
A. The cheapest bus fare available between Ludhiana to Lucknow is ₹ 716. Book Now
Q. What are the popular bus operators currently serving buses for Ludhiana to Lucknow route?
A. Our top bus operators for Ludhiana to Lucknow bus route are: GK Travels, Gajraj bus service, INDO CANADIAN® EXPRESS (Luxury Intercity Service), Mahalaxmi Travels Book Now
Boarding points in Ludhiana
- Samrala Chowk
- Samrala Chowk Opp Gurdawara
- Rara Sahib Market Near Regenta Central Klassik
- Ludhiana Bypass
- Charanpreet Market Jawahar Nagar camp Near Main Bus Stand
- Shri JI Travels Samrala Chowk
Dropping points in Lucknow
- Alambagh
- Transport Nagar
- R k marriage hall neharia lucknow
- Transport Nagar Metro Station Gate No.2
- Nahariya-Avadh Chowraha
Top routes from Ludhiana
- Ludhiana to Delhi Bus
- Ludhiana to Chandigarh Bus
- Ludhiana to Gurgaon Bus
- Ludhiana to Jaipur Bus
- Ludhiana to Amritsar Bus
- Ludhiana to Jammu Bus
- Ludhiana to Katra Bus
- Ludhiana to Gorakhpur Bus
- Ludhiana to Lucknow Bus
- Ludhiana to Dehradun Bus
- Ludhiana to Delhi Airport Bus
- Ludhiana to Sri Ganganagar Bus
- Ludhiana to Jalandhar Bus
- Ludhiana to Jodhpur Bus
- Ludhiana to Bikaner Bus
- Ludhiana to Kanpur Bus
- Ludhiana to Pathankot Bus
- Ludhiana to Haldwani Bus
- Ludhiana to Panipat Bus
- Ludhiana to Noida Bus
- Ludhiana to Rudrapur Bus
- Ludhiana to Haridwar Bus
- Ludhiana to Rishikesh Bus
- Ludhiana to Fazilka Bus
- Ludhiana to Jalalabad Bus
- Ludhiana to Khatushyamji Bus
- Ludhiana to Sonipat Bus
- Ludhiana to Kathua Bus
- Ludhiana to Hanumangarh Bus
- Ludhiana to Ambala Bus
- Ludhiana to Kharar Bus
- Ludhiana to Dasuya Bus
- Ludhiana to Lakhanpur Bus
- Ludhiana to Bathinda Bus
- Ludhiana to Kartarpur Bus
- Ludhiana to Goraya Bus
- Ludhiana to Agra Bus
- Ludhiana to Mathura Bus
- Ludhiana to Ringas Bus
- Ludhiana to Samrala Bus
Top routes to Ludhiana
- Delhi to Ludhiana Bus
- Chandigarh to Ludhiana Bus
- Gurgaon to Ludhiana Bus
- Jaipur to Ludhiana Bus
- Amritsar to Ludhiana Bus
- Gorakhpur to Ludhiana Bus
- Lucknow to Ludhiana Bus
- Jammu to Ludhiana Bus
- Dehradun to Ludhiana Bus
- Bikaner to Ludhiana Bus
- Jalandhar to Ludhiana Bus
- Jodhpur to Ludhiana Bus
- Katra to Ludhiana Bus
- Haldwani to Ludhiana Bus
- Kanpur to Ludhiana Bus
- Sri Ganganagar to Ludhiana Bus
- Khalilabad to Ludhiana Bus
- Mohali to Ludhiana Bus
- Abohar to Ludhiana Bus
- Rudrapur to Ludhiana Bus
- Sonipat to Ludhiana Bus
- Karnal to Ludhiana Bus
- Kharar to Ludhiana Bus
- Panipat to Ludhiana Bus
- Basti to Ludhiana Bus
- Delhi Airport to Ludhiana Bus
- Faizabad to Ludhiana Bus
- Vrindavan to Ludhiana Bus
- Noida to Ludhiana Bus
- Faridabad to Ludhiana Bus
- Samba (Jammu And Kashmir) to Ludhiana Bus
- Kartarpur to Ludhiana Bus
- Lakhanpur to Ludhiana Bus
- Agra to Ludhiana Bus
- Goraya to Ludhiana Bus
- Bathinda to Ludhiana Bus
- Dasuya to Ludhiana Bus
- Mathura to Ludhiana Bus
- Sikar to Ludhiana Bus
- Ringas to Ludhiana Bus
Top routes to Lucknow
- Delhi to Lucknow Bus
- Jaipur to Lucknow Bus
- Noida to Lucknow Bus
- Gurgaon to Lucknow Bus
- Varanasi to Lucknow Bus
- Agra to Lucknow Bus
- Greater Noida to Lucknow Bus
- Indore to Lucknow Bus
- Dehradun to Lucknow Bus
- Mathura to Lucknow Bus
- Gorakhpur to Lucknow Bus
- Kota to Lucknow Bus
- Allahabad to Lucknow Bus
- Jhansi to Lucknow Bus
- Ballia to Lucknow Bus
- Haridwar to Lucknow Bus
- Ujjain to Lucknow Bus
- Ghaziabad to Lucknow Bus
- Bhopal to Lucknow Bus
- Haldwani to Lucknow Bus
- Ghazipur to Lucknow Bus
- Gwalior to Lucknow Bus
- Chandigarh to Lucknow Bus
- Patna to Lucknow Bus
- Kathgodam to Lucknow Bus
- Bareilly to Lucknow Bus
- Meerut to Lucknow Bus
- Mau to Lucknow Bus
- Azamgarh to Lucknow Bus
- Mehandipur Balaji Temple to Lucknow Bus
- Dausa to Lucknow Bus
- Kaptanganj to Lucknow Bus
- Gonda to Lucknow Bus
- Sultanpur (Uttar Pradesh) to Lucknow Bus
- Balpur(Uttar Pradesh) to Lucknow Bus
- Baskhari to Lucknow Bus
- Atraulia to Lucknow Bus
- Kannauj to Lucknow Bus
- Mohammadabad to Lucknow Bus
- Jagdishpur(Uttar Pradesh) to Lucknow Bus
- Ludhiana to Lucknow Bus
Top routes from Lucknow
- Lucknow to Delhi Bus
- Lucknow to Jaipur Bus
- Lucknow to Noida Bus
- Lucknow to Gurgaon Bus
- Lucknow to Varanasi Bus
- Lucknow to Agra Bus
- Lucknow to Greater Noida Bus
- Lucknow to Indore Bus
- Lucknow to Dehradun Bus
- Lucknow to Mathura Bus
- Lucknow to Gorakhpur Bus
- Lucknow to Allahabad Bus
- Lucknow to Kota Bus
- Lucknow to Ghaziabad Bus
- Lucknow to Patna Bus
- Lucknow to Ballia Bus
- Lucknow to Haridwar Bus
- Lucknow to Ujjain Bus
- Lucknow to Gwalior Bus
- Lucknow to Haldwani Bus
- Lucknow to Jhansi Bus
- Lucknow to Bhopal Bus
- Lucknow to Ghazipur Bus
- Lucknow to Chandigarh Bus
- Lucknow to Azamgarh Bus
- Lucknow to Meerut Bus
- Lucknow to Kathgodam Bus
- Lucknow to Bareilly Bus
- Lucknow to Mau Bus
- Lucknow to Jodhpur Bus
- Lucknow to Kaptanganj Bus
- Lucknow to Sultanpur (Uttar Pradesh) Bus
- Lucknow to Nawabganj Bus
- Lucknow to Raebareli Bus
- Lucknow to Gonda Bus
- Lucknow to Jewar Bus
- Lucknow to Baskhari Bus
- Lucknow to Atraulia Bus
- Lucknow to Sidhauli(Uttar Pradesh) Bus
- Lucknow to Jagdishpur(Uttar Pradesh) Bus
- Lucknow to Ludhiana Bus
Popular cities near Ludhiana
- Jalandhar Bus
- Ambala Bus
- Phagwara Bus
- Chandigarh Bus
- Panipat Bus
- Mohali Bus
- Karnal Bus
- Panchkula Bus
- Amritsar Bus
- Kurukshetra Bus
- Pathankot Bus
- Beas Bus
- Mukerian Bus
- Zirakpur(Punjab) Bus
- Rajpura Bus
- Murthal Bus
- Khanna Bus
- Phillaur Bus
- Kathua Bus
- Sonipat Bus
- Kharar Bus
- Dasuya Bus
- Lakhanpur Bus
- Bathinda Bus
- Kartarpur Bus
- Samba (Jammu And Kashmir) Bus
- Goraya Bus
- Samrala Bus
- Moga Bus
Popular cities near Lucknow
- Ayodhya Bus
- Agra Bus
- Basti Bus
- Barabanki Bus
- Gorakhpur Bus
- Kanpur Bus
- Khalilabad Bus
- Faizabad Bus
- Azamgarh Bus
- Unnao Bus
- Bahraich Bus
- Mathura Bus
- Jarwal Road Bus
- Sitapur Bus
- Harraiya Bus
- Bhelsar Bus
- Balpur(Uttar Pradesh) Bus
- Kaptanganj Bus
- Sultanpur (Uttar Pradesh) Bus
- Allahabad Bus
- Nawabganj Bus
- Raebareli Bus
- Gonda Bus
- Sidhauli(Uttar Pradesh) Bus
- Baskhari Bus
- Jagdishpur(Uttar Pradesh) Bus
- Atraulia Bus
- Kannauj Bus
- Bareilly Bus
- Akbarpur (Kanpur Dehat) Bus
Top Bus Operators Between Ludhiana and Lucknow
- INDO CANADIAN® EXPRESS (Luxury Intercity Service) Bus
- SPEEDY LUXURY TRAVELS Bus
- Ride On Wheels Bus
- Lavish Travels Bus
- Ankit Travels Bus
- Raj Kalpana Travels Pvt.Ltd Bus
- Lat Sahab Bus Service Bus
- Ganeshwari Travels Bus
- Mahalaxmi Travels Bus
- Mahalaxmi Travels Bus
- Sanskar Travels Bus
- VANDE BHARAT TOURISM Bus
- Vamika Travels Bus
- Amit Travels Bus
- Neeraj travels Bus
- Jagdamba tourism Bus
- Tiger Point Travels Bus
- RAO SAHAB TRAVELS PRIVATE LIMITED Bus
- Mannat Holidays Bus
- Vaishali Express Bus
- Devraj Travels Bus
- NAYAR TRAVELS (OPC) PVT LTD Bus
- GK Travels Bus
- Shiwani express Bus
- Gajraj bus service Bus
- Arhaan Travels Bus
- Shri Rishabh Travels Bus
- Vaishali Bus Services Private Limited Bus
- ARMAAN TOUR & TRAVELS Bus
- Yolo Bus
- Arhaan Travels Bus
- Virat Travels Bus
- KN Nehra Travels Bus
- Armaan Tour & Travels Bus
- zingbus Bus
- Golden Temple Volvo Bus Service Bus
- Shri Krishna Travels ( Jai Shree Ganesh Yatra Co.) Bus
- Travel Point World LLP Bus
- Hari Das Tour &Travels Bus
- Ankush travels Bus
- PEPSU Bus
- UPSRTC Bus
Top Bus Operators from Ludhiana
- Ludhiana to Delhi INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- Ludhiana to Chandigarh Jujhar Travels Bus
- Ludhiana to Amritsar INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- Ludhiana to Jammu INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- Ludhiana to Gorakhpur GK Travels Bus
- Ludhiana to Katra INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- Ludhiana to Gurgaon IntrCity SmartBus Bus
- Ludhiana to Jaipur Vijay Tour and Travels Bus
- Ludhiana to Jalandhar INDO CANADIAN TRANSPORT CO PRIVATE LIMITED Bus
- Ludhiana to Lucknow GK Travels Bus
Top Bus Operators to Lucknow
Airport Routes from Ludhiana
Airport Routes to Ludhiana
Airport Routes from Lucknow
Airport Routes to Lucknow
Hotels in Ludhiana
Hotels in Lucknow
AC Seater Sleeper Bus from Ludhiana
- Ludhiana to Delhi AC Seater Sleeper Bus
- Ludhiana to Chandigarh AC Seater Sleeper Bus
- Ludhiana to Gurgaon AC Seater Sleeper Bus
- Ludhiana to Jaipur AC Seater Sleeper Bus
- Ludhiana to Amritsar AC Seater Sleeper Bus
- Ludhiana to Jammu AC Seater Sleeper Bus
- Ludhiana to Katra AC Seater Sleeper Bus
- Ludhiana to Gorakhpur AC Seater Sleeper Bus
- Ludhiana to Dehradun AC Seater Sleeper Bus
- Ludhiana to Delhi Airport AC Seater Sleeper Bus
- Ludhiana to Sri Ganganagar AC Seater Sleeper Bus
- Ludhiana to Jalandhar AC Seater Sleeper Bus
- Ludhiana to Jodhpur AC Seater Sleeper Bus
- Ludhiana to Bikaner AC Seater Sleeper Bus
- Ludhiana to Kanpur AC Seater Sleeper Bus
- Ludhiana to Pathankot AC Seater Sleeper Bus
- Ludhiana to Haldwani AC Seater Sleeper Bus
- Ludhiana to Panipat AC Seater Sleeper Bus
- Ludhiana to Noida AC Seater Sleeper Bus
- Ludhiana to Rudrapur AC Seater Sleeper Bus
- Ludhiana to Haridwar AC Seater Sleeper Bus
- Ludhiana to Rishikesh AC Seater Sleeper Bus
- Ludhiana to Fazilka AC Seater Sleeper Bus
- Ludhiana to Jalalabad AC Seater Sleeper Bus
- Ludhiana to Khatushyamji AC Seater Sleeper Bus
- Ludhiana to Sonipat AC Seater Sleeper Bus
- Ludhiana to Kathua AC Seater Sleeper Bus
- Ludhiana to Hanumangarh AC Seater Sleeper Bus
- Ludhiana to Ambala AC Seater Sleeper Bus
- Ludhiana to Kharar AC Seater Sleeper Bus
- Ludhiana to Dasuya AC Seater Sleeper Bus
- Ludhiana to Lakhanpur AC Seater Sleeper Bus
- Ludhiana to Bathinda AC Seater Sleeper Bus
- Ludhiana to Kartarpur AC Seater Sleeper Bus
- Ludhiana to Goraya AC Seater Sleeper Bus
- Ludhiana to Agra AC Seater Sleeper Bus
- Ludhiana to Mathura AC Seater Sleeper Bus
- Ludhiana to Ringas AC Seater Sleeper Bus
- Ludhiana to Samrala AC Seater Sleeper Bus
AC Seater Sleeper Bus to Lucknow
- Delhi to Lucknow AC Seater Sleeper Bus
- Jaipur to Lucknow AC Seater Sleeper Bus
- Noida to Lucknow AC Seater Sleeper Bus
- Gurgaon to Lucknow AC Seater Sleeper Bus
- Varanasi to Lucknow AC Seater Sleeper Bus
- Agra to Lucknow AC Seater Sleeper Bus
- Greater Noida to Lucknow AC Seater Sleeper Bus
- Indore to Lucknow AC Seater Sleeper Bus
- Dehradun to Lucknow AC Seater Sleeper Bus
- Mathura to Lucknow AC Seater Sleeper Bus
- Gorakhpur to Lucknow AC Seater Sleeper Bus
- Kota to Lucknow AC Seater Sleeper Bus
- Allahabad to Lucknow AC Seater Sleeper Bus
- Jhansi to Lucknow AC Seater Sleeper Bus
- Ballia to Lucknow AC Seater Sleeper Bus
- Haridwar to Lucknow AC Seater Sleeper Bus
- Ujjain to Lucknow AC Seater Sleeper Bus
- Ghaziabad to Lucknow AC Seater Sleeper Bus
- Bhopal to Lucknow AC Seater Sleeper Bus
- Haldwani to Lucknow AC Seater Sleeper Bus
- Ghazipur to Lucknow AC Seater Sleeper Bus
- Gwalior to Lucknow AC Seater Sleeper Bus
- Chandigarh to Lucknow AC Seater Sleeper Bus
- Patna to Lucknow AC Seater Sleeper Bus
- Kathgodam to Lucknow AC Seater Sleeper Bus
- Bareilly to Lucknow AC Seater Sleeper Bus
- Meerut to Lucknow AC Seater Sleeper Bus
- Mau to Lucknow AC Seater Sleeper Bus
- Azamgarh to Lucknow AC Seater Sleeper Bus
- Mehandipur Balaji Temple to Lucknow AC Seater Sleeper Bus
- Dausa to Lucknow AC Seater Sleeper Bus
- Kaptanganj to Lucknow AC Seater Sleeper Bus
- Gonda to Lucknow AC Seater Sleeper Bus
- Sultanpur (Uttar Pradesh) to Lucknow AC Seater Sleeper Bus
- Balpur(Uttar Pradesh) to Lucknow AC Seater Sleeper Bus
- Baskhari to Lucknow AC Seater Sleeper Bus
- Atraulia to Lucknow AC Seater Sleeper Bus
- Kannauj to Lucknow AC Seater Sleeper Bus
- Mohammadabad to Lucknow AC Seater Sleeper Bus
- Jagdishpur(Uttar Pradesh) to Lucknow AC Seater Sleeper Bus
Popular Volvo City Buses
- Bathinda Volvo Bus
- Greater Noida Volvo Bus
- Jhansi Volvo Bus
- Meerut Volvo Bus
- Nawabganj Volvo Bus
- Indore Volvo Bus
- Kota Volvo Bus
- Atraulia Volvo Bus
- Dausa Volvo Bus
- Panipat Volvo Bus
- Raebareli Volvo Bus
- Sri Ganganagar Volvo Bus
- Gonda Volvo Bus
- Mohammadabad Volvo Bus
- Ambala Volvo Bus
- Gurgaon Volvo Bus
- Jewar Volvo Bus
- Ballia Volvo Bus
- Rishikesh Volvo Bus
- Kartarpur Volvo Bus
- Jalalabad Volvo Bus
- Hanumangarh Volvo Bus
- Jalandhar Volvo Bus
- Haridwar Volvo Bus
- Ujjain Volvo Bus
- Gwalior Volvo Bus
- Pathankot Volvo Bus
- Kharar Volvo Bus
- Fazilka Volvo Bus
- Amritsar Volvo Bus
- Ghaziabad Volvo Bus
- Faridabad Volvo Bus
- Jagdishpur(Uttar Pradesh) Volvo Bus
- Karnal Volvo Bus
- Sonipat Volvo Bus
- Chandigarh Volvo Bus
- Samrala Volvo Bus
- Samba (Jammu And Kashmir) Volvo Bus
- Agra Volvo Bus
- Mehandipur Balaji Temple Volvo Bus
- Bareilly Volvo Bus
- Baskhari Volvo Bus
- Mohali Volvo Bus
- Kaptanganj Volvo Bus
- Sidhauli(Uttar Pradesh) Volvo Bus
- Mathura Volvo Bus
- Khatushyamji Volvo Bus
- Kannauj Volvo Bus
- Ringas Volvo Bus
- Vrindavan Volvo Bus
- Katra Volvo Bus
- Dasuya Volvo Bus
- Allahabad Volvo Bus
- Sikar Volvo Bus
- Kathgodam Volvo Bus
- Dehradun Volvo Bus
- Gorakhpur Volvo Bus
- Ghazipur Volvo Bus
- Bikaner Volvo Bus
- Delhi Airport Volvo Bus
- Kanpur Volvo Bus
- Azamgarh Volvo Bus
- Haldwani Volvo Bus
- Bhopal Volvo Bus
- Kathua Volvo Bus
- Ludhiana Volvo Bus
- Lakhanpur Volvo Bus
- Jodhpur Volvo Bus
- Jammu Volvo Bus
- Delhi Volvo Bus
- Rudrapur Volvo Bus
- Patna Volvo Bus
- Khalilabad Volvo Bus
- Faizabad Volvo Bus
- Abohar Volvo Bus
- Mau Volvo Bus
- Jaipur Volvo Bus
- Varanasi Volvo Bus
- Basti Volvo Bus
- Goraya Volvo Bus
- Balpur(Uttar Pradesh) Volvo Bus
- Sultanpur (Uttar Pradesh) Volvo Bus
- Noida Volvo Bus
- Lucknow Volvo Bus