To ask the Secretary of State for Transport (1) what was the increase in rigid lorry traffic in the first quarter of 1988; and what was his Department's forecast;(2) what was the increase in motor traffic in the first quarter of 1988 over the first quarter of 1987; and what were his Department's forecasts;(3) what was the increase in motorway traffic in the first quarter of 1988 over the first quarter of 1987; and what were his Department's forecasts.

The estimated increases in vehicle kilometres on the first quarter of 1987 were:

	Per cent.
All motor vehicles	13
Rigid Heavy Goods Vehicles	11
All motor vehicles on motorways	19

Forecasts are not made for particular three-month periods or particular road classes. There are no separate forecasts for rigid goods vehicles which are included in those for the heavy goods vehicle category.The latest traffic forecasts for all vehicle categories are given in table 2.42 of "Transport Statistics of Great Britain 1976–1986", which is held in the Library.