Now, what does "positive on balance" mean?

Mekies: "We call it 'positive on balance' on these cases, because the number of scenarios in which the halo would have helped is

**compared to the number of scenarios where it would have been neutral or negative."**

*overwhelming*CAR-TO-CAR CONTACT

positive on balance: 2007 F1 Melbourne, Wurz & Coulthard

positive on balance: 2010 F1 Monte Carlo, Chandhok & Trulli

positive on balance: 2012 F1 Abu Dhabi, Karthikeyan & Rosberg

positive on balance: 2012 F1 Spa-Francorchamps, Alonso & Grosjean

positive on balance: 2015 F1 Spielberg, Räikkönen & Alonso

positive on balance: 2007 GP2 Magny-Cours, Glock & Zuber

positive on balance: 2016 F3 Macau, Sasiki & Ye

neutral: 2010 F1 Abu Dhabi, Schumacher & Liuzzi

CAR-TO-ENVIRONMENT CONTACT

positive: 2001 F1 Spa-Francorchamps, Burti

positive: 2008 F1 Barcelona, Kovalainen

positive: 2012 F1 test Duxford, de Villota

positive: 2015 F1 Sochi, Sainz

positive: 2017 F1 Monaco, Wehrlein

positive: 1995 F3000 Magny-Cours, Campos

positive on balance: 2007 GP2 Magny-Cours, Viso

positive on balance: 2016 F3 Spielberg, Li

neutral: 2014 F1 Japan, Bianchi (FIA's comment: impact beyond capabilities of the Halo)

EXTERNAL OBJECTS

positive: 2009 F2 Brands Hatch, Surtees

positive: 2015 Indycar Pocono, Wilson

positive on balance: 2009 F1 Hungaroring, Massa

positive on balance: 2013 F1 Nürburgring, Chilton

The FIA video: https://youtu.be/AYkGjUHstKY