Decarbonising Transport – Setting the Challenge

On Friday 27th March the Department for Transport issued ‘Decarbonising Transport – Setting the Challenge’ – click here for the full report. This announced the…

Coronavirus and Traffic Surveys – what does it mean for your projects?

Traffic levels and travel patterns will alter significantly over the coming weeks and months due to the impact of the social distancing strategy being employed…

Business Continuity at PJA

We would like to reassure all our clients and partner organisations that PJA will be able to provide continuity of service throughout this period of…

London Collective

Standardised Speed Distributions

When developing a microsimulation model, one of the early steps is to ensure that the desired speed distributions used in the model are appropriate for the area and network modelled.

At PJA, we have a template which bases these initial distributions on two key datasets – the DfT’s ‘vehicle speed compliance’ tables and TfL’s speed profiles.

‘Living with Beauty’ Final Report published

On 30th January 2020 the ‘Building Better, Building Beautiful Commission’, the independent body set up to advise government on how to promote and increase the…

VISSIM Convergence

Dynamic Assignment in VISSIM

The use of dynamic assignment in VISSIM models can be considered a ‘dark art’, with very little content online which demonstrates how to go about this process and what the key elements are to look out for.

As a result, we wanted to share our thoughts and current methodology to a wider audience. We are aware that there is no ‘one best solution’ to undertaking dynamic assignment, but hope this helps to generate further debate and/ or improvement and provide some help to those who are looking for a starting point with dynamic assignment.

A year in our life #PJADidGood

With increased turnover, new team members, senior promotions and a new office, 2019 saw us continue to grow in strength and success. Helping to secure…