Refurbishments are due to start later this month on the Crawley bypass railway bridge.
There will also be improvements to the traffic signals and drainage network on the A23 near the Ifield Community College junction.
Works are expected to begin on the 23rd of July, lasting until October.
A West Sussex County Council spokesperson said: “The high volume of traffic on this busy route has resulted in surface damage that leads to potholes, ruts and other defects. Resurfacing this busy section of the A23 will increase skid resistance and allow traffic to drive more smoothly which will improve safety for all road users.
“Extending the life of the bridge is necessary to maintain traffic flow on the A23 into the future. By using this opportunity to coordinate this essential work with our other works in the same area we can keep traffic disruption to a minimum.
“The existing traffic lights are nearing the end of their useful life. Upgrading them with the latest technology will help traffic to flow through the junction more efficiently and save on energy.”
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