Kevin Boone
Executive Vice President of Sales and Marketing at CSX
Thank you, Jim. Turning to Slide five. Third quarter revenue increased 21% year-over-year with growth across all major lines of business. Merchandise revenue increased 4% on 3% lower volume as the impact of ongoing automotive semiconductor shortages was more than offset by revenue growth across all other merchandise markets.
Industrial and construction related end markets continue to demonstrate the strongest growth. Even though declines in energy related markets remain a headwind for our chemical business, it's important to highlight that our core chemical, plastics and waste markets continue to show solid year-over-year growth.
Intermodal revenue increased 16% on flat volumes as international growth, driven by strong underlying demand and continued growth in rail volumes from East Coast ports was offset by domestic declines, due to ongoing driver and equipment shortages. Coal revenue increased 39% on 2% lower volume. Increases in export coal shipments driven by the impact of rising benchmark prices was partially offset by the effect of declines in domestic volumes, largely related to producer outages.
Other revenue increased primarily due to higher intermodal storage and equipment usage driven by supply chain disruptions resulting from truck driver shortages, chassis availability in the lack of warehouse capacity. As we exited the fourth quarter, we clearly saw the effects Omicron, but December volumes impacted by labor and supply chain disruptions. These challenges have continued into the New Year, where we are seeing customers face labor shortages and their operations. As we look across merchandise intermodal and coal markets demand signals remain strong and supply chain challenges normalize, we would expect volumes to align more with demand.
Finally, I would like to highlight the positive results we have achieved by working with customers on new business development projects. Over the last few months, we have seen three significant announcements of new production of facilities to be located on the CSX railroad, including two electric vehicle plants and a new steel mill. These projects are a team effort and show the ability of sales and marketing team and partnership with operations to creatively come up with solutions that meet the requirements of our customers. Importantly, these projects represent significant long-term value to CSX.
Now let's discuss the progress CSX is making when it comes to our commitment to sustainability as summarized on Slide six. Rail is the most efficient form of land based transportation, then CSX is the most fuel-efficient Class 1 railroad -- US Class 1 railroad. By using CSX rail in 2021 our customers avoided 11 million metric tons of carbon dioxide emissions, which is equivalent to taking 2.3 million passenger vehicles off the road, an amount greater than all the hybrid and electric vehicles operating in the US today. We are proud of the recognition we have received for these efforts to-date. By organizations such as GDP, Dow Jones and Forbes, but we're certainly not done. CSX continue to invest in existing technologies to drive further improvement and we continue to evaluate emerging technologies, so we are prepared to realize those benefits when available.
We are excited to see our customers increased focus on improving their carbon footprint. Customer engagement on ESG has accelerated and we have seen them doubled their usage of CSX provided tools, but helping calculate emission savings from switching to rail. You will also see later this quarter, we will be recognizing customers for their efforts and prioritizing carbon emission savings a converting traditional truck volume to rail.
I will now pass it on the Jamie for -- to discuss our operations.