CATIII ILS Localiser Sensitive Area is protected 137m either side of runway centreline and as such all aircraft, vehicles and any other temporary obstacles remain clear of this area to ensure the ILS is safeguarded. The ground lighting configuartion will change an the red stopbars will illuminate at the CATIII holds. If I'm not mistken, if an aircraft has not cleared the runway by the time the next arrival is at 4 NM???? then a go-around will ensue. Pilots will report clear of the runway having cleared the alternate amber/green lead-off centreline lighting. As HD stated, airport with SMR have a distinct advantage, at EGCC for example the SMR screen has an LSA overlay to aid controllers. LVP State is broadcast by ATIS, but promulgation by RTF is particularly important on initiation and cancellation of LVP's.....see the attached AAIB Bulletin.
http://www.aaib.dft.gov.uk/publicati...cq__g_jmaa.cfm