PHILADELPHIA (WPVI) -- The city has announced a number of road closures in connection to this weekend's Philadelphia Marathon, along with some SEPTA detours.Some of the major areas impacted include:The Benjamin Franklin Parkway Friday, November 18 through Sunday, November 20Citywide along the 26.2-mile route of the Philadelphia Marathon on Sunday, November 20The I-676 off-ramps at 22nd Street (westbound) and 23rd Street (eastbound) will be closed on Saturday, November 19 and Sunday, November 20 after 4 a.m. for event security preparation. Ramps at 15th/Broad may also close, if needed.The outer lanes of the Benjamin Franklin Parkway will be closed, from 9:30 a.m. until 3:30 p.m., on Friday, November 18. At 3:30 p.m., all lanes will be opened for the afternoon rush hour.For the Half Marathon, due to enhanced security, City of Philadelphia "no-parking" regulations will be enforced strictly and all vehicles on the race route will be relocated, beginning at 2 a.m. on Saturday, November 19. Drivers impacted are encouraged to contact Philadelphia Parking Authority at 215-683-9550.Street closures will be in effect for the Philadelphia Half Marathon, Rothman Institute 8K and Kids Fun Run on Saturday, from 2 a.m. until 3 p.m., along the Benjamin Franklin Parkway, between 20th to 25th Streets, and also on Kelly Drive, Martin Luther King Drive, and numerous other roads in Center City (see complete list below). Signage labeled "no parking" will be posted in the Parkway area, and elsewhere, along the race course in advance. On Saturday, the vicinity near 18th Street and the Parkway, and the Logan Circle area will be closed to vehicular traffic until 11:30 a.m.The following streets will be affected across the city on Saturday, November 1918th Street, from Arch to Callowhill Streets19th Street, from Arch to Callowhill Streets20th Street, from Arch to Callowhill Streets21st Street, from Spring Garden to Arch Streets22nd Street, from Spring Garden to Arch StreetsBenjamin Franklin Parkway, from 16th to 22nd StreetsArch Street, from 6th to 16th Street6th Street, from Race to Market StreetsMarket Street, from 5th to 17th StreetsEast Penn SquareJohn F. Kennedy Blvd., from Juniper to 17th Streets15th Street, from Race to Chestnut Streets16th Street, from Chestnut to Race StreetsLansdowne Drive, from Girard Avenue to South Concourse DriveLansdowne Drive, to Centennial CircleBlack RoadMartin Luther King DriveGreen Drive, Ford Road, Chamounix DriveStrawberry Mansion Drive, Dauphin Drive, Reservoir DriveEdgely Drive, Randolph Drive, Mt. Pleasant Drive, Fountain Green DriveKelly DriveMotorists and pedestrians can expect significant delays when trying to cross roads or streets that are adjacent to the course. Police will allow traffic through intersections along the course, when possible, depending on the flow of the race participants. All streets are scheduled to be reopened by 2 p.m. on Saturday, November 19.For the Philadelphia Marathon, due to enhanced security, City of Philadelphia "no-parking" regulations will be enforced strictly and all vehicles on the race route will be relocated, beginning at 2 a.m. on Sunday. Drivers impacted are encouraged to contact Philadelphia Parking Authority at 215-683-9550. In addition, on Sunday, the Parkway, from 20th to 25th Streets, will be closed, from 2 a.m. to 4 p.m. Other streets along the race course will reopen as runners pass by and the streets are cleaned.The following streets will be affected across the city on November 20:18th Street, from Arch to Callowhill Streets19th Street, from Arch to Callowhill Streets20th Street, from Arch to Callowhill Streets21st Street, from Spring Garden to Arch streets22nd Street, from Spring Garden to Arch StreetsBenjamin Franklin Parkway, from 22nd to 16th StreetsArch Street, between 16th to 3rd Streets4th Street, between Arch to Vine StreetsRace Street, from 6th Street to Columbus BoulevardColumbus Boulevard (Southbound lanes), from Vine Street to Washington AvenueSouthbound off-ramp, from I-95 at Washington AvenueWashington Avenue, from Columbus Boulevard to Front StreetFront Street, from Washington Avenue to South StreetSouth Street, from Front to 7th Streets6th Street, from Bainbridge to Market StreetsChestnut Street, from 6th to 34th Streets34th Street, Chestnut Street to Girard AvenueLansdowne Drive, from Girard Avenue to South Concourse DriveSouth Concourse Drive, from Lansdowne to West Memorial Hall DrivesWest Memorial Hall Drive, from South Concourse to Avenue of the RepublicAvenue of the Republic, from West Memorial Hall Drive to Catholic FoundtainBelmont Avenue, Montgomery to Parkside AvenueBlack RoadMartin Luther King DriveKelly DriveThe Falls BridgeRidge Avenue, from Schoolhouse Lane to Manayunk AvenueMain Street, from Ridge Avenue to Green LaneMotorists and pedestrians can expect significant delays when trying to cross roads or streets that are adjacent to the course. Police will allow traffic through intersections along the course, when possible, depending on the flow of the race participants. All streets are scheduled to be reopened by 6 p.m. on Sunday, November 20On Saturday, November 19, 20 bus detours will begin at 6 a.m. due to street closures for the Philadelphia Half-Marathon, Rothman 8K and Kids Run.On Sunday, November 20, six routes will be placed on detour beginning at 2 a.m. to accommodate Marathon set-up.At 6 a.m., 27 additional routes will be placed on detour due to street closures.Buses will also replace trolleys on Routes 10 and 15 on Sunday.Buses will return to their regular routes as close to the end of the events as possible.Full details are below:Routes 2, 4, 7, 16, 17, 23, 27, 31, 32, 33, 38, 43, 44, 45, 47, 47M, 48, 61, 124 and 125 will be detoured beginning at 6 a.m. Buses will return to their regular routes as close to the end of the events as possible.Routes 7, 32, 33, 38, 43 and 48 will be placed on detour beginning at 2 a.m. to accommodate course set-up and the marathon. Routes K, R, 2, 4, 5, 9, 12, 16, 17, 21, 23, 25, 27, 30, 35, 40, 42, 44, 47, 47M, 57, 61, 64, 124 and 125 will begin detours at 6 a.m. through the conclusion of the race events on Sunday afternoon. In addition, buses will replace trolleys on Route 10 and 15 to accommodate detours. Buses will return to their regular routes as close to the end of the events as possible.ONLINE:Philadelphia MarathonPhila.gov/www.septa.org