Railways Total: 2,745 km Broad gauge: 923 km 1.676-m gauge Narrow gauge: 1,822 km 1.000-m gauge (1998 est.) Highways Total: 204,022 km Paved: 25,095 km Unpaved: 178,927 km (1996 est.) Waterways 5,150-8,046 km navigable waterways (includes 2,575-3,058 km main cargo routes) Pipelines Natural gas 1,220 km Ports and harbors Chittagong, Dhaka, Mongla Port Merchant marine Total: 40 ships (1,000 GRT or over) totaling 315,855 GRT/453,002 DWT Ships by type: bulk 2, cargo 33, oil tanker 2, refrigerated cargo 1, roll-on/roll-off cargo 2 (1998 est.) Airports 16 (1998 est.) Airports - with paved runways Total: 15 Over 3,047 m: 1 2,438 to 3,047 m: 2 1,524 to 2,437 m: 4 914 to 1,523 m: 1 Under 914 m: 7 (1998 est.) Airports - with unpaved runways Total: 1 Over 3,047 m: 1 (1998 est.)