Pound Road was extended a few hundred metres west across a new bridge over the freeway, with Dandenong-bound ramps.

The bridge over Lyndhurst Interchange was duplicated with little fanfare in the late 1998s, leading to increased use of the road, mostly to semi-trailers and heavy freight to get to the docks in the Westernport district (Dandenong-Hastings Road was yet again renamed the Western Port Highway to reflect this and was eventually duplicated).

In 2010, the Pound Road half-diamond interchange was substantially upgraded with a new four-lane carriageway being constructed over the freeway, the addition of traffic lights to the on-ramp intersection, and ramp metering signals.

So, as part of the major 2007 M1 (Monash-CityLink-WestGate) Upgrade; which included widening to more lanes, updates to safety, electronic drive time signs and associated arterial road real-time information signs and a freeway management system with ramp metering (key component).

Therefore, it also included installation of hundreds of new in-road sensors on the freeway with associated access point poles, data stations and CCTV cameras.

With Victoria's conversion to the newer alphanumeric system in the late 1990s this was replaced by routes M1 and M420 respectively.