| Country: | PHL |
| Previous Type: | N |
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| Next Route: | 51 |
| Previous Route: | 10 |
| Route: | 11 |
| Type: | N |
| Image Notes: | Carlos P. Garcia Avenue |
| Maint: | the Department of Public Works and Highways |
| Cities: | Taguig, Pasig, Quezon City |
| Terminus A: | in Quezon City |
| Direction A: | North |
| Direction B: | South |
| Terminus B: | East Service Road in Taguig |
| Length Km: | 18 |
| Junction: |
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National Route 11 (N11) is an 18km (11miles) major primary route that forms part of the Philippine highway network. It is a component and the main route of Circumferential Road 5 (C-5), connecting the cities of Taguig, Pasig and Quezon City.[1] [2] [3]
When the routes were assigned by the Department of Public Works and Highways, the segment of Circumferential Road 5 (C-5) from Taguig to Quezon City, except for its at-grade section below the Bagong Ilog Flyover in Pasig, was assigned as N11. These roads under C-5 include Carlos P. Garcia Avenue, Eulogio Rodriguez Jr. Avenue, Bonny Serrano Avenue, and Katipunan Avenue.
See main article: Circumferential Road 5, Bonny Serrano Avenue and Katipunan Avenue. The route's northern terminus starts from a route change from N129 while making a junction on C.P. Garcia Avenue, a tertiary road in Barangay U.P. Campus, Quezon City.[4] It traverses to the Quezon City, Pasig, and Taguig. In Quezon City, the highway then follows Katipunan Avenue's at-grade section parallel to the Katipunan/Aurora Flyover, classified as a tertiary road that carries traffic crossing N59. Later, it follows the Libis Tunnel, Libis Flyover, and the at-grade section of C-5 as it transitions from Katipunan Avenue to Eulogio Rodriguez Jr. Avenue via Bonny Serrano Avenue. In Pasig, the highway is carried by the Bagong Ilog Flyover as it parallels another C-5 route (N141) below the flyover. Upon leaving Taguig, the route meets the respective interchanges of C-5 Southlink Expressway and South Luzon Expressway (SLEX) before its southern terminus at the East Service Road, a frontage road of the Skyway At-Grade section of SLEX.