The expressway has a total length of 44.3 km (27.5 mi), passing through Semenyih, Pajam, Mantin, Temiang and connecting to the Seremban Inner Ring Road.

The construction was delayed, however, due to financial problems faced by the original concessionnaire, Kajang–Seremban Highway Sdn.

[1] Phase 1 of the expressway connecting Kajang South to Pajam was officially opened on 23 August 2008.

public by-pass road circumnavigating the BR 7 launch site,[clarification needed] from the Federal Route FT3265, to the Pajam Interchange, then onto the Pajam Toll Plaza, and coming out again at FT3265 nearer to the town of Nilai, recast the eight I-20 beams, and then re-launched them.

There were no public funds involved in the repair work, and all costs were borne by the contractor.