The M37 is a metropolitan route in Greater Johannesburg, South Africa.

[1][2] It connects the N3 at Greenstone Shopping Mall with Katlehong via Edenvale and Germiston.

[3] The M37 begins at Longmeadow Business Estate west of Modderfontein as an off-ramp of the N3 highway (Johannesburg Eastern Bypass).

[4]: 85  South of Edenvale, at the suburb of Meadowbrook, the M37 crosses the R24 highway (Albertina Sisulu Freeway) and meets the western terminus of the M99 road before crossing the N12 highway and entering the city of Germiston, bypassing Bedfordview to the east.

[4]: 155  It becomes Masakhane Street and passes under the N3 highway to enter the township of Katlehong, where it ends at the junction with Kgotso Street west of the Katlehong Railway Station.