|Length:||9 miles (14.5 km)|
|Meets:||A49, A572, A580, B5207, B5237, A58, A577, B5238|
|Route outline (key)|
The A573 is a south-to-north road in south Lancashire, constituting a 9-mile loop off the A49.
The route begins on the A49 some three miles north of Warrington at a T-junction by The Swan public house in the village of Winwick, just yards from junction 9 of the M62. Once out of Winwick, the speed limit rises from 30 mph to 40 for three quarters of a mile before the national speed limit (NSL) comes into force in open countryside shortly before the point where our road crosses over the M6.
Two railway lines are crossed in quick succession east of Newton-le-Willows before the limit drops to 30 mph just before the staggered crossing of the A572 and continues past the houses on Golborne Dale Road in Town of Lowton. Beyond yet another railway bridge (this time it's a low overbridge) the NSL resumes briefly until we reach a roundabout junction with the East Lancs Road (A580) immediately south of Golborne.
The A573 continues north through Golborne, doglegging slightly where it crosses the B5207, the speed limit rising from 30 to 40 mph after about a mile and a half as we leave the built-up area. Approaching Abram, three quarters of a mile later, the limit reverts to 30 mph and this will be the limit for the remainder of the route. There is a tight S-bend to cross over the Leeds & Liverpool Canal at Dover Lock. The road enters the built-up area of Abram, before quickly entering Platt Bridge. The A573 disappears momentarily as it multiplexes with the A58 between a set of traffic lights and a small roundabout.
The A573 reappears, and heads north, straight into Wigan; there are a couple of new roundabouts for new estates. The road has a 17.5 tonne weight limit where it crosses over a railway line on the edge of Wigan. Immediately after this it intersects the A577, then approaches the A49, where it terminates.