The Dunheved Business Park at St Mary, is a former World War II munitions plant now used as an industrial area.

The precinct is home to more than 600 businesses and needs further improvements for the future.

This will come to a head as Westbus moves its its terminal from Penrith to the business park and more companies plan to move to the area.

There will be more traffic congestion, especially as internal roads are narrow and have limited access.

Penrith Valley Chamber of Commerce president Jill Woods said she and business owners are frustrated by the ad hoc planning of the area and that the State Government is unable to give Penrith Council funding to at least widen the roads.

A month ago Planning Minister Kristina Keneally pledged the State Government's support for the local area at a Penrith luncheon.

Ms Woods said she has since studied the budget breakdown. Despite Ms Keneally's recent visit, Ms Wood finds no money fed into the business park.

``There was very little in the budget for western Sydney at all,'' Ms Woods said.

``The Planning Minister sent me a letter last week. I'm still waiting.

``The Government wants us to find jobs for thousands of people but we haven't got the means to get them here or look after them.''

Ron Thomson, who owns Laser Wizards, would like to see better power, phone communications and cable internet.

`` We only have ADSL, which is slow,'' he said.

``There's also only one bus in the morning to bring workers in. It's only two kilometres from the station but it doesn't help in cold or rainy weather.

``I'd like to see a bus circuit here for the workers.''