Wheelchair users arriving by car can access the site from Biereyestrasse (two gradients of up to 7% over 50m and 150m). The route is narrow with cobblestones. There is one disabled car park near the Atelierskaserne, building no. 12 towards the entrance to the underground passages. From cathedral square, it is a steep ascent via Petrinistrasse to Peterstor gate (10% gradient in places). The paving on this route is suitable for wheelchairs. Pathways on the plateau are also suitable for wheelchairs (cobblestones, asphalt and unmade paths). The height of the fortress wall is 1.2m and there are several lookout hatches for wheelchair users. Reaching the lookout hatches requires crossing a drainage channel (threshold of 2.5cm). The tour has limited accessibility for wheelchair users. The tour of the listening tunnels is not suitable for wheelchair users and not recommended for people with limited mobility as there are narrow, uneven pathways with numerous steps.
There are toilet facilities at the coach turning circle at Petersberg Citadel. Route from Biereyestrasse is 10m with an 8% gradient and a 6% transverse slope over 4m. Note: accessibility: 80cm on the right, 70cm on the left.
There is a signpost system with information for wheelchair users. A Petersberg Citadel guidebook in Braille can be purchased or borrowed (deposit required) from Erfurt Tourist Information at Benediktsplatz 1. The old quarter sightseeing bus takes visitors to the citadel as part of the tour. The citadel is also a stop on the iGuide tour (with hearing loops) and the video guide tour in German sign language.
In Ravelin Anselm, an area of the fortress containing listening tunnels will be made accessible for many visitor groups. This will be a first in Europe and provide an unparalleled experience for older visitors, those using wheeled walkers and families with prams. The listening tunnel is almost 210 metres long and will feature a handrail throughout. A ramp will provide access, so that even at 23 metres in height the tunnel will be easy for wheelchair users to get into.