Winnie, yes ,usually up to 400ft I think; however,in event of a x-wind there is a significant difference in an airliners track v-heading at 150-180 kts off the end of a runway,and a helicopters track at 60kts even starting in mid-field; you may have drifted over a terminal/hangars etc.,and the cleared area only starts from the ends of the runway for obstacles..
There have been discussions on this before,think in `tech log`.....one size does not fit all....and one can always say departure heading is not acceptable until I reach `xxx ft`,I Will fly r/wy track......One can argue that the runway heading is fixed,and therefore it is a `track` as far as an aircraft is concerned...!!..but let`s not fight about it....