Management at the Coniston office of international IT firm Computer Sciences Corporationhave presented the Roads and Traffic Authority with a petition of more than 300 signatures opposing the proposed median closure of Drummond St, Mount St Thomas.
CSC spokesman Trevor Hardy said the introduction of a 24-hour, no-right-turn rule at the intersection of Drummond St and Masters Rd, would have an "extreme effect" on the company and its 380 employees.
"We have about 1000 vehicle movements a day going in and out, and if it is closed we will have to go via Figtree shops or do a big wrap-around on Five Islands Rd," Mr Hardy said. "The CSC management would not like to go against any safety issues, we would just like to say that it would be a major inconvenience to us."
At present, vehicles are not allowed to turn right from Masters Rd into Drummond St, and right from Drummond St onto Masters Rd during peak periods.
The RTA is proposing to make this rule permanent to improve safety at the intersection, saying there have been two fatalities and 30 crashes at the site in 12 years.
Residents and businesses have also signed a petition, echoing CSC's opposition to the change.
Lounges Plus owner Paul Gauci said closing the median would have a negative impact on his business as many customers used the road to access his shop, while long-term resident John Gralton questioned why a roundabout or traffic lights could not be installed at the site.
An RTA spokeswoman said traffic lights were not suitable for a number of reasons.
"Traffic signals are found to increase the possibility of rear-end crashes and would attract increased traffic volumes through the residential areas of Mount St Thomas," the spokeswoman said.
"(They also) cause a wider dispersion of traffic to other locations, be undesirable with the anticipated growth in heavy vehicles travelling through this location, and reduce capacity for the 25,000 vehicles travelling along this link each day."
The proposal would be funded under the Australian Government's black spot program.