A great presentation by @philip about modal filters.
Most modal filters all over Melbourne were built before the 1993 council amalgamations. Many in response to freeway expansion.
Modal filters definitely have a marketing problem. My mum knows what a modal filter is, what it does, and why it's great but didn't know what what 'modal' was supposed to mean.
Someone suggested 'Rat Trap' as a trap for rat runners.
A few people suggested that focusing on rat running instead of benefits to walking and cycling might help get modal filters in.
Someone suggested that people that are rat running often don't feel like they're rat running.
So a better definition of rat running or some marketing around rat running might help get people to get the idea.