...technology has already been specified or is in the process of installation include: motorway gantries for monitoring the hardshoulder, motorway bridge abutments to look underneath the bridge into the void space to detect any undesirable behaviour...
http://www.securitypark.co.uk/security_article263276.html
...trouble free computing without regular maintenance your PC may splutter and grind to a halt leaving you stranded on the hardshoulder of the information highway according to IBM, the worlds largest computer company if all the dust and contaminants...
http://www.mrpcclean.co.uk/