[1] Mersing town is particularly significant for a number of reasons: it is one of only two major towns in the eastern half of Johor state (the other being Kota Tinggi); it lies on the main trunk road that connects southern as well as eastern Johor with the east coast of Pahang state including Pahang's capital Kuantan (part of Federal Route; and it is the main departure point for ferries to the nearby offshore islands such as Rawa Island of Sultan Iskandar Marine Park (Malay: Taman Laut Sultan Iskandar) and also Tioman Island, Pahang.

Northward this highway goes to Kuantan, Kuala Terengganu and Kota Bharu before terminating at Rantau Panjang at the border with Thailand.

Southwards highway 3 goes to Jemaluang and Kota Tinggi and terminates at Johor Bahru, the state capital.

Jalan Felda Nitar connects Felda Nitar, Kluang, Ayer Hitam and Batu Pahat, also connects to North–South Expressway Southern Route via Ayer Hitam Interchange to Kuala Lumpur.

Mersing Bus and Taxi Terminal (Malay: Terminal Bas dan Teksi Bandar Mersing) on Jalan Tepian Sungai is served by various companies including Transnasional and Causeway Link.