Earls Gate Roundabout is part of junction 6 of the M9, although it only provides a single sliproad onto the motorway and the south-eastbound off-slip is further north along the A905. The south facing slips are omitted completely due to a mixture of factors, including land constraints and potential weaving issues between this junction and M9 J5, which lies less than 2 miles to the south. However, as originally constructed, the two junctions were designed to compliment each other, and so J5 had no north facing slips.
The junction was built on the site of a crossroads between the A904 and the A905, positioned near the chemical works. It became a small roundabout in the 1950s, and a large roundabout when the M9 was built. The A905 has been moved to the north east on both approaches to make way for the motorway, and now runs roughly parallel to it on either side. The A904 crosses at right angles, and so while there are three junctions on the roundabout to the east of the motorway, on the west side there was originally only the A904 and the M9 onslip. More recently, a small service area has been squeezed into the corner between these two. The roundabout is now signalised for all three of the A roads, but the services and M9 sliproad are not provided with lights.