19 JUNE 1964, Page 11

Ask Ernie Appendix 4 of the report on ,Road Pricing,

published by the Ministry of Transport, opens thus:

Consider a road network in which a parking tax of ti per p.c.u. is imposed on every journey,• non-parking traffic being ignored. Since the tax per p.c.u. journey is fixed, the tax per mile depends on the length of journey. If the journey length is t miles, the tax is flit per p.c.u. mile.

There follow four pages of equations. ALI queries should be addressed to the. Rt. Hon.

Ernest Marples, MP, St. Christopher House, Southwark Street, SEI.