Passage: The four main islands and all the towns and villages are linked by well-constructed roads. There were 3,164 km (1,966 mi) of roadways in 2002, of which 2,433 km (1,512 mi) were paved. A causeway stretching over 2.8 km (2 mi), connect Manama with Muharraq Island, and another bridge joins Sitra to the main island. The King Fahd Causeway, measuring 24 km (15 mi), links Bahrain with the Saudi Arabian mainland via the island of Umm an-Nasan. It was completed in December 1986, and financed by Saudi Arabia. In 2008, there were 17,743,495 passengers transiting through the causeway.Bahrain's port of Mina Salman is the main seaport of the country and consists of 15 berths. In 2001, Bahrain had a merchant fleet of eight ships of 1,000 GT or over, totaling 270,784 GT. Private vehicles and taxis are the primary means of transportation in the city.

Question: How good are the roads constructed?
well-constructed