Road markings eg. arrows no longer visible

As you drive on the roundabout under the M5 at Jct 3 towards Kidderminster there are three lanes. The right hand lane is only for traffic turning right towards the slip road onto the M5 travelling North. The other two lanes, the middle and left lanes, are straight ahead only to exit the roundabout onto the Hagley Road. However, now that the markings in all these lanes have almost completely faded I have, when driving in the right-hand lane experienced, on at least three occasions recently, the need to swerve or break to avoid a collision with vehicles also trying to turn also but doing so from the middle lane. The markings have been allowed to fade badly over a long period and now urgently need re-marking to avoid collisions.