The best place to test a bus/lorry/truck is up and down KL-Karak highway to-and-fro.
No need go Puspakom.
It's so obvious to see the engine power, black exhaust, brake, steering, bald tyre, worn out suspension, over loading, etc.
Cannot do on public road loh.....hahaha

To test a bus/lorry/truck (no need go for Puspakom), any highway in Malingsai can be a testing ground (consist of sapu corner test and top speed test, the rest belakang kira). These two main criterias are required to become a skillful Malingsai driver.
Honestly, i really hope that those madcow express bus drivers, mostly on Plusway and/or trunk road and brutal trailer/truck drivers, mostly plying nearby Port Klang at Pulau Indah and Kesas highway after Shah Alam (many road users and passengers complaint about the excessive travelling at highly illegal speed somemore have their nerve to push the smaller vehicles off the road) should find any crane/concrete barrier/solid wall as well as tree(s) to crash themselves and perished/paralyzed as we do not need those killers on the road and to reduce the likelihood of multiple vehicle crashing into each other in single horrific crashes.