If you have a flight or train to catch in Delhi today, September 12, do not leave home assuming that your usual route will work. The BRICS Leaders' Summit is being held in the capital, and Delhi Police has put several roads and corridors under traffic restrictions and diversion arrangements.The restrictions on Saturday are scheduled from 9:30 am to 9:30 pm. The arrangements are focused on central Delhi and routes connected to the Bharat Mandapam area, but their impact can extend to commuters travelling towards major railway stations and the Indira Gandhi International Airport.Delhi Police has advised commuters to plan their journeys in advance and use the Metro wherever possible. For people with flights or trains, leaving earlier than usual would be a safer option.BRICS Summit Delhi traffic: Which roads are affected?The controlled road network covers several important stretches of central and south Delhi. These include:Tees January MargAkbar RoadTeen Murti MargMother Teresa CrescentSardar Patel MargJanpathSubramaniam Bharti MargRajesh Pilot MargPurana Qila RoadSher Shah Suri MargTilak MargBhagwan Das RoadLodhi RoadNeela GumbadKartavya PathTughlaq RoadMathura RoadFirozeshah RoadAfrica AvenueK.M. Ataturk MargAPJ Abdul Kalam RoadC-HexagonDr Zakir Hussain MargAshoka RoadPrithviraj RoadKautilya MargSafdarjung RoadPanchsheel MargSan Martin MargNyaya MargBrigadier Hoshiar Singh MargHowever, commuters should note that being on the controlled-area list does not automatically mean a road will remain completely closed throughout the day. Traffic can be regulated, stopped or diverted depending on VVIP movement and security requirements.— dtptraffic (@dtptraffic) 22 diversion points: Where can traffic be redirected?Delhi Traffic Police has identified 22 diversion points for the summit period. Important locations include Dr Dinesh Nandini Dalmia Chowk, Ram Charan Aggarwal Chowk, Guru Nanak Chowk, KG Marg/Outer Circle, Janpath, Patel Chowk, RML Hospital, Vande Mataram Marg/Simon Bolivar Marg, Dhaula Kuan Flyover and Moti Bagh Flyover.Other diversion locations include Brigadier Hoshiar Singh Marg, Madarsa T-Point, Lodhi Road intersections, Neela Gumbad, the area below Oberoi Flyover, the U-turn opposite DPS Mathura Road, Ring Road/Bhairon Road and Mandi House.At some points, traffic will be sent towards alternative roads. For example, traffic heading towards Mathura Road and Tilak Marg from Dr Dinesh Nandini Dalmia Chowk will not be allowed, with commuters directed towards Bahadur Shah Zafar Marg, IP Marg and Sikandra Road.At Patel Chowk, movement towards Windsor Place and RBI is restricted, while Ashoka Road towards GPO and Sansad Marg towards Connaught Place are among the alternatives.Going to New Delhi Railway Station? Check these routesPassengers travelling to New Delhi Railway Station should avoid relying on their normal approach road. According to the traffic plan, passengers coming from the north can use:ISBT Kashmiri Gate → Boulevard Road → Rani Jhansi Marg → DBG RoadThose coming from the south or east can take:Ashram Chowk → Ring Road → Raj Ghat → JLN MargFor passengers approaching from the west, the suggested route is:Vande Mataram Marg → Dr Ambedkar Marg → Panchkuian Road → Outer Circle, Connaught Place.If your train departs during the restriction period, factor in additional time for security checks, diversions and possible congestion.Going to Old Delhi Railway Station?For Old Delhi Railway Station, commuters from the north can use:ISBT Kashmiri Gate → Ring Road → Hanuman Mandir → S.P. Mukherjee MargPassengers coming from the south and east have been advised to use:Ashram Chowk → Ring Road → Raj Ghat → Hanuman Mandir → S.P. Mukherjee Marg.Hazrat Nizamuddin Railway Station routeFor passengers travelling to Hazrat Nizamuddin Railway Station from south Delhi, the suggested approach is:AIIMS → Ring Road → Ashram Chowk → Mathura RoadThe route plan is particularly important for passengers who normally use central Delhi roads to reach the station.Delhi airport today: Which routes should passengers use?The airport is not shut, but road restrictions and VVIP movement can affect the journey to the terminals. Delhi Police has issued separate route plans for airport-bound commuters.For passengers travelling from Gurugram to T3, T4 and T2, the suggested route is:NH-48 → Rao Gajraj Singh Marg → Old Delhi Gurugram Road → UER-II → NH-48 service road → terminalFor Terminal 1, the suggested route includes:NH-48 → Mahipalpur Flyover → T-3 Road/NH-48 → Ulan Batar Marg → T-1 Road.Passengers coming from Dwarka can use Sector-22 Dwarka Road and UER-II, including the newly operated tunnel towards T3.For people travelling from New Delhi and south Delhi, the suggested approach includes AIIMS Chowk, Ring Road, Moti Bagh Chowk, RTR Marg, Shankar Vihar Flyover, Sanjay T-Point, the NH-48 service road and the Mahipalpur Flyover/Rangpuri corridor.Should you take the Metro to the airport?Yes, Delhi Police has specifically advised commuters to consider Metro services for airport travel because of the road restrictions. If your flight is important, the Metro can also reduce the uncertainty caused by road diversions. But passengers should still leave enough time to travel from their home to the Metro station and from the station to the terminal.Do not treat the absence of a complete road closure as a guarantee of normal traffic. VVIP movement can result in temporary stoppages and diversions.Train passengers face another problemRoad traffic is not the only issue for travellers today. Northern Railway has also made temporary changes to train operations between September 11 and 13, including cancellations, diversions, rescheduling and changes in originating or terminating stations.For September 12, several trains have been listed for diversion, including the Gomti Express, Shramjeevi Express, Rajdhani services, Vaishali Express, Magadh Express and Swatantrata Senani Express. Several Delhi-NCR EMU services have also been cancelled or altered.Passengers should therefore check their train number and running status before leaving for the station. Northern Railway has advised passengers to use the National Train Enquiry System (NTES) or call 139 for the latest information.What should passengers do today?If you have a flight or train today, keep a few extra hours in hand rather than cutting the journey close.For flights: check your terminal, leave early and consider the Metro where practical.For trains: check the train's live status, platform and any change in originating or terminating station before leaving home.For road travel: check Delhi Traffic Police updates and be prepared for a diversion even if your normal road appears open.Delhi Police has advised commuters to follow traffic personnel's directions during the summit. Emergency and essential-service vehicles will receive priority passage.The 18th BRICS Leaders' Summit is being held in New Delhi on September 12 and 13, with heightened security arrangements across the capital. For travellers, the key message is simple: do not rely on your usual route today, and do not leave for the airport or railway station at the last minute.