Highways Analyst Waypoint and Percentile Product Tip

Highways Analyst Waypoint and Percentile Product Tip

We have some exciting news regarding our web tool Highways analyst and our new Waypoint and Percentile features!

Users of Highways Analyst will now have access to brand new features and improvements in our Winter 2020 update. These will help you do quickly do more detailed analysis and enhance your outputs when analysing Trafficmaster data.

This top will explain the two main new features, along with a video showing them in action.

Feature 1: Waypoint

Our first new feature the Waypoint tool allows you to find out the fastest route based on time between a start point (A) and an end point (B).

Before you can begin using this fantastic new tool, you will need to simply run a query using the calculation wizard. Once the results have loaded, click on ……. to open this window.

As it suggests, just click on the map where you would like the marker for the start of the route to be, this will be labelled A.

Then click again to place the end point, this will be labelled B

This will then display the fastest route between both points following the direction of the road.

Additional markers can also be placed along the route, which will snap to the closest road link. To place more nodes, hover over an already selected link, when the cursor changes click and drag the cursor to the road you wish to place another marker. This will re-map the route automatically.

Mapped routes can then be exported out as either a shapefile or a tabular report.

That is the Waypoint feature in a nutshell, pretty cool if I do say so myself. If you do come to using this, below are some tips that we recommend you follow so you get the most out of it.

Tip number 1:

If looking at small routes, make sure to run queries for the area of interest only and not county-wide, otherwise it will take a long time to compute the route.

Tip number 2:

When it comes to exporting the results out, it is best that you use the Selected Links’ report. This report will then show the links considered as part of the route and are displayed in chronological order as shown visually in Highways Analyst.

Tip Number 3:

Take extra care when placing the A and B markers, as it is the closest road link with data to each of these points that will be picked up.

 

Tip Number 4:

As mentioned previously, the report will order the road links chronologically. If one link has populated data for both A and B this suggests that at some point along the route, the link has been used twice.

 

Tip Number 5:

Comparison Reports can be exported for the links selected in Waypoint mode.

However, when switching between Report 1 and Report 2 in HA, the waypoint will disappear. If you want to view the other report, simply click ‘Run’ in the Waypoint window and the route will reappear.

Feature 2: Percentile

For those of you already familiar with Highways Analyst, you will know that there is currently an option to include a percentile in the Calculation Wizard and Chart, which removes extreme speed values (outliers) from the data. There is now an all new Percentile feature, entirely standalone from the existing Percentile option, which you can find when exporting the results.

Enabling the percentile feature when exporting results, will re-run the original query excluding the percentile used, provided a percentile was placed on the results previously. It is therefore advisable to use this feature for selected links where possible.

 

The report will order the results smallest to largest for every link and find the value that sits at no. 75 for each link in each direction using the number of counts recorded, (e.g. based on 75% as highlighted in the tabular report). Should there not be a value for the percentile selected, it will then interpolate the results to work out what the 75th percentile would be.

NB: This only works if there are more than 10 counts for each link in each direction.

For example: if there are 1118 counts for osgb4000000023258436A, the speed results are ordered smallest to largest and the 75th value will be returned, which is 99.39 in the image below. Whereas side B has not populated the 75th percentile as the results did not meet the minimum requirement for number of counts.

NB: If a 50th percentile is used, this value will differ to the average speed value. The 50th percentile returns the speed value that sits at no.50 from the recorded speeds ordered smallest to largest whereas the average speed will be all the speed records for a link added together and divided by the number of counts.  

Now that you know the ins and outs of HA’s newest features, you can go right ahead and start using them. Make sure to take a look at our new Help Guide when you log into Highways Analyst as this provides additional information that may be of use. You will find this in the dropdown list under your username.

Dan has over 10 years experience as a Product Manager at Basemap looking at the full product life cycle using AGILE/SCRUM and liaises between key stakeholders and developers to ensure first class applications are built. He is the resident expert on data and software solutions that Basemap offer its clients.