Mountain Highway

Mountain Highway starts at the intersection with Burwood Highway in western Wantirna, heading north-east as a four-lane, dual-carriageway highway under Eastlink until reaching Wantirna Road in Wantirna, where it widens to a six-lane, dual-carriageway highway, and continues east through Bayswater, over the Belgrave railway line until the intersection with Scoresby and Bayswater Roads, where it narrows back to a four-lane, dual-carriageway highway, continuing east until Dorset Road, where it narrows further to a dual-lane, single-carriageway road.

It continues south-east through Boronia to The Basin, then uphill through the Dandenong Ranges National Park (between Forest Road and Mount Dandenong Tourist Road) where sections are steep and windy, with an approximate 1 in 20 (5%) grade, especially popular with motorcyclists and cyclists, and is busiest on the weekends.

The previous 70 km/h speed limit was removed in 2014 as part of the VicRoads initiative to eliminate 70 km/h and 90 km/h zones, and the drop in speed limit is presumed to be attributable to the presence of cyclists and lack of road shoulder or bicycle lane.

Mountain Highway was signed as Metropolitan Route 28 between Wantirna and Sassafras in 1965.

[2] The road is still presently known (and signposted) as Mountain Highway along its entire length.