Road safety - the safety of cyclists in particular - was once again headline news this past week. The tragic death of a cyclist, killed by a lorry, brought into focus yet again just how vulnerable you are on two wheels. That complex junction at the end of Portobello High Street has seen more than its fair share of such tragedies over the years. And as David Calder reports for this week's episode, it's in danger of throwing the Scottish Government and Edinburgh Council's active travel policies into disarray.