It comes after at least three accidents on, or near, the bridge in the past three months that have effectively shut down the major north-south thoroughfare.

Despite having proven its worth as a flood-free access to the city during high river levels, delays on the bridge - which opened in 1997 - have constantly ground the gears of drivers with limited alternatives.

Rapid growth of the city's outer northern suburbs and Charles Sturt University (CSU) have compounded the problem.

A Busabout service coming into the city from CSU was held up for about half an hour after an accident involving two cars during Tuesday's afternoon peak.

It is believed the cars were travelling in a southerly direction over the bridge when one ran up the back of the other about 5pm.

Busabout depot manager Matthew Bell said, despite being an inconvenience to customers, little could be done when accidents happened.

"It's a vital link, but it is a bit of a bottleneck," Mr Bell said.

"There's no real alternative, unless you put in a parallel bridge."

In a statement, Roads and Maritime Services said it had "no plans to upgrade or provide an alternative structure to the two lane Gobbagombalin Bridge".

"In the event of a crash or incident involving the bridge, traffic is detoured via North Wagga," a spokeswoman said.

Mr Bell said an additional bus and driver had been previously called in to ensure disrupted services continued.

On some occasions, customers have missed connecting services.

"We've had about three or four incidents in the past couple of months, where town buses and school buses have been held up due to something that happened on or near the bridge," he said.

"The bus (on Monday night) was already on the bridge.

"Once it's on the bridge there's no way it can turn around."

The bus was about 40 minutes late by the time it got into town, Mr Bell said.

Turvey Park fire station commander Jeff Wellfare said the bridge caused few problems for Fire and Rescue NSW crews.

The Daily Advertiser also sought comment from other emergency services.

Following a three-vehicle crash on June 2, traffic heading into Wagga was reportedly banked up to the Estella off-ramp during the afternoon school rush.

GOBBA TRAFFIC WOES

August 12, 5pm - two-car accident, traffic at standstill on bridge

July 20, 7pm - accident at Travers St roundabout closed Olympic Highway

June 2, 3.30pm - three-vehicle crash, traffic reportedly banked up to Estella off-ramp