Vehicle glass includes windscreens, side and rear windows, and glass panel roofs on a vehicle. Twin high impact windscreens are provided, with dual blade wipers. A full fairing protects the rider, varying height fixed windscreens were available as options. They were stripped of all non-essentials, including doors, windscreens and roofs. To increase protection, periscopes are installed instead of windscreens and vision blocks. The cockpit is protected by ballistic-resistant windscreens and a titanium-armored tub. It features stained glass windows on the platform windscreens and station house. Similarly, laminated glass has been widely applied to vehicles for windscreens. Each of these privately owned minibuses display their particular route on signboards behind their windscreens. Some taller riders complained of wind buffeting with the smaller S model stock windscreens. It stoned the lawyers' chambers and smashed the windscreens of their cars. For example, Series IV models have parabolic leaf springs, one-piece windscreens and fully fitted interiors. Of those, 31 unsold competition models were detuned and fitted with windscreens for street use. Recognisable by their large curved windscreens. These used distinctive forward-tilted windscreens, intended to reduce sun reflections.