on the
Senai-Desaru Expressway, Johor, the longest river bridge in
Malaysia as well the longest single plane cable-stayed bridge in
Malaysia. under construction in January 2009 The tolled expressway is a combination of a four-lane dual carriageway (Senai–Cahaya Baru section) and a
two-lane single carriageway (Cahaya Baru–Penawar section), which improves road connection between western and eastern Johor. It features a closed toll system like the
North–South Expressway. It is also an alternative route to Desaru Beach, instead of
Federal Route 3 and
Federal Route 92 from
Johor Bahru and
Singapore. The highway has become the main access road to Desaru from
North–South Expressway Southern Route E2 and a major road link to
Senai International Airport from
Kota Tinggi and eastern parts of Johor. Construction of the road included the 1.7 kilometre
Sungai Johor Bridge, the longest single plane
cable stayed bridge in Malaysia across
Johor River, which became the longest river bridge in
Malaysia after
Batang Sadong Bridge in
Sarawak. The section between Cahaya Baru and Penawar is built as a
two-lane expressway (except the Sungai Johor-SDE bridge) while retaining the
full access control, making the section as the first true two-lane expressway with full access control in Malaysia. There is a
water catchment area located along Sungai Layang sections near the
Sultan Iskandar Reservoir. Senai–Desaru Expressway traverses through the environmentally sensitive water catchment area of Sultan Iskandar Reservoir. Senai–Desaru Expressway is the only expressway in Malaysia which features the
Pollutant Removal System (PRS). The expressway took one step higher by introducing the PRS to monitor and control any potential impact to the water quality in Sultan Iskandar Reservoir in the event of a spillage of dangerous and hazardous chemicals from any vehicle travelling on the expressway. ==Toll systems==