Updated Nik The Greek's original Real Subway to work with the Enhanced Edition.

Los Angeles Metro complete re texture from Los Santos Subway.
All signs that display the travel routes and how to instructions and images pulled from the Los Angeles subway maps.
(Santa Monica,Bunker Hill , Koreatown,Compton,Rodeo Drive,Beverly Grove, LAX).
The mod contains also some billboards in bunker hill area

Install
Open: OPEN IV
look at the x64 files down....

downtown: x64i.rpf/levels/gtav/_citye/downtown_01/downtown.rpf
ap1_01: x6L.rpf/levels/gtav/_cityw/airport_01/ap1_01_b.rpf
dt1_lod: x64i.rpf/levels/gtav/_citye/downtown_01/dt1_lod.rpf
sunset: x6L.rpf/levels/gtav/_citye/sunset/sunset.rpf
sm1_15: x64m.rpf/levels/gtav/_cityw/santamon_01/sm_15.rpf
kt1_rd: x6L.rpf/levels/gtav/_cityw/koreatown_01/kt1_rd.rpf
bh1_01: x6L.rpf/levels/gtav/_cityw/beverly_01/bh1_rd.rpf
vp coin: x64i.rpf/levels/gtav/props/recreational/vp_coin_op.rpf
v_int_metro6: x64h.rpf/levels/gtav/interiors/v_int_metro_subway6.rpf
v_int_metro3: x64h.rpf/levels/gtav/interiors/v_int_metro_subway3.rpf
int_services: x64c.rpf/levels/gtav/interiors/int_props/int_services.rpf
sc1_00c: x64k.rpf/levels/gtav/_citye/scentral_01/sc1_00c.rpf
v_int_metro4: x64h.rpf/levels/gtav/interiors/v_int_metro_subway4.rpf
v_int_metro5: x64h.rpf/levels/gtav/interiors/v_int_metro_subway5.rpf
sc1_23: x64k.rpf/levels/gtav/_citye/scentral_01/sc1_23.rpf
kt1_09: x6L.rpf/levels/gtav/_cityw/koreatown_01/kt1_09.rpf
v_int_metro2: x64h.rpf/levels/gtav/interiors/v_int_metro_subway2.rpf
v_int_metro1: x64h.rpf/levels/gtav/interiors/v_int_metro_subway1.rpf
dt1_04: x6L.rpf/levels/gtav/_citye/sunset/bt1_04.rpf
dt1_21: x64i.rpf/levels/gtav/_citye/downtown_01/dt1_21.rpf

Original Credits at @Nik The Greek for the Legacy version