When entering West Jakarta, Route 1 still runs eastwards and parallel with the Mookervaart.
3.5 km east of Banten-Jakarta border, the route interchanges with JORR West 1.
The route continues 6.5 km eastwards, crossing over Cengkareng Drain, Angke River, and Western railway line.
In Grogol, it has an interchange with Jakarta Inner Ring Road (Pluit-Tomang section).
From here, Route 1 turns northwards, following Jl.
Satria Raya and then Jl.
Dr. Latumeten parallel with, marking its divergence with the old Great Post Road continuing eastwards as Jl.
Kyai Tapa.
Route 1 also intersects with Route 2 running southwards as Jl.
LetJend.
S. Parman.
After crossing over Grogol River, Jl.
Dr. Latumeten converges with Jl.
Dr. Makaliwe and then Jl.
Dr. Latumeten goes across Ciliwung River.

An intersection with Jl.
Pangeran Tubagus Angke marks the entrance of Route 1 into North Jakarta approximately one kilometer after crossing Ciliwung.
The route then goes northward for 1 km as Jl.
Jembatan Dua and then Jl.
Jembatan Tiga before entering an intersection with Harbour Toll Road in Jembatan Tiga.
Continuing 750 m north, it turns eastwards as Jl.
Pluit Selatan Raya for 1.3 km after reaching a junction near Atma Jaya Catholic University of Indonesia.
The route then enters the Old City, running concurrently with Jl.
Gedong Panjang, Jl.
Pakin, and Jl.
Kerapu.
After leaving Sunda Kelapa, Route 1 runs eastwards for 10 km as Jl.
Lodan Raya, Jl.
RE.
Martadinata, Jl.
Taman Stasiun Priok, and Jl.
Enggano.
In Jl.
RE.
Martadinata, the route runs parallel with Harbour Toll Road, Ancol River, and Inner City Railway Line (Jakarta Kota to Tanjung Priok segment).
It passes near Tanjung Priok Port.
After Tugu Junction, it runs southwards for 6.5 km as Jl.
Laks.
Yos Sudarso, parallel with Sunter River.
Wiyoto–Wiyono Toll Road lies above the route between Sungai Bambu and Pulomas.
Along this segment, there are 2 access entering for the toll road.
Route 1 intersects with Route 13 and Jl.
Suprapto in Pulomas, and then it turns eastwards.
Route 1 initially runs southeastward for 4 km, and then one kilometer eastward after 3-way junction with Jl.
Bekasi Raya.

Cakung River marks the complete entrance of the route into East Jakarta.
Continuing 1.3 km eastward, it interchanges with JORR East 2 in Cakung.
The route's segment in Jakarta ends 3.5 km later, when it crosses Bendungan Merah River.
When entering West Jakarta, Route 1 still runs eastwards and parallel with the Mookervaart. 3.5 km east of Banten-Jakarta border, the route interchanges with JORR West 1. The route continues 6.5 km eastwards, crossing over Cengkareng Drain, Angke River, and Western railway line. In Grogol, it has an interchange with Jakarta Inner Ring Road (Pluit-Tomang section). From here, Route 1 turns northwards, following Jl. Satria Raya and then Jl. Dr. Latumeten parallel with, marking its divergence with the old Great Post Road continuing eastwards as Jl. Kyai Tapa. Route 1 also intersects with Route 2 running southwards as Jl. LetJend. S. Parman. After crossing over Grogol River, Jl. Dr. Latumeten converges with Jl. Dr. Makaliwe and then Jl. Dr. Latumeten goes across Ciliwung River.
An intersection with Jl. Pangeran Tubagus Angke marks the entrance of Route 1 into North Jakarta approximately one kilometer after crossing Ciliwung. The route then goes northward for 1 km as Jl. Jembatan Dua and then Jl. Jembatan Tiga before entering an intersection with Harbour Toll Road in Jembatan Tiga. Continuing 750 m north, it turns eastwards as Jl. Pluit Selatan Raya for 1.3 km after reaching a junction near Atma Jaya Catholic University of Indonesia. The route then enters the Old City, running concurrently with Jl. Gedong Panjang, Jl. Pakin, and Jl. Kerapu. After leaving Sunda Kelapa, Route 1 runs eastwards for 10 km as Jl. Lodan Raya, Jl. RE. Martadinata, Jl. Taman Stasiun Priok, and Jl. Enggano. In Jl. RE. Martadinata, the route runs parallel with Harbour Toll Road, Ancol River, and Inner City Railway Line (Jakarta Kota to Tanjung Priok segment). It passes near Tanjung Priok Port. After Tugu Junction, it runs southwards for 6.5 km as Jl. Laks. Yos Sudarso, parallel with Sunter River. Wiyoto–Wiyono Toll Road lies above the route between Sungai Bambu and Pulomas. Along this segment, there are 2 access entering for the toll road. Route 1 intersects with Route 13 and Jl. Suprapto in Pulomas, and then it turns eastwards. Route 1 initially runs southeastward for 4 km, and then one kilometer eastward after 3-way junction with Jl. Bekasi Raya.
Cakung River marks the complete entrance of the route into East Jakarta. Continuing 1.3 km eastward, it interchanges with JORR East 2 in Cakung. The route's segment in Jakarta ends 3.5 km later, when it crosses Bendungan Merah River.
Indonesian National Route 1