7 FOOTWAY INFRASTRUCTURE FOR BUS STOPS Photo d – Easy access radius and transition kerbs 7.13 Easy access kerbs are not appropriate where there is a likelihood of front or rear overhang or sharp angle tyre impact as they are designed for parallel running. They are also not appropriate where car parking may prevent buses approaching parallel with the kerbline. For the same reasons, lengths of this kerbing or similar should be introduced with a specially designed leading corner or transition stone and/or a lead-in taper so as to negate a sharp angle tyre impact (see Photo 7d). 7.14 To facilitate the bus making a parallel approach to the kerb the recommended minimum length of easy access kerbing is • 4m at lightly used or alighting bus stops • 8m at single bus stops where only one bus is scheduled to arrive at anyone time and a standard shelter is provided • 16mat a double bus stop and, • 28m at a double bus stop used by standard (12m) and articulated buses. These lengths do not include for transition kerbs. 44