Create an Amazon CloudFront distribution and configure an origin group containing one origin for each ALB. Designate one of the origins as the primary origin.

Set up an Amazon Route 53 health check for each ALB. Establish a Route 53 failover routing record that points to the two ALBs and set the 'Evaluate Target Health' value to 'Yes'.

Deploy two Amazon CloudFront distributions, each with one ALB as its origin. Create an Amazon Route 53 failover routing record that points to the two CloudFront distributions and set the 'Evaluate Target Health' value to 'Yes'.

Implement an Amazon Route 53 health check for each ALB. Create a Route 53 latency alias record that points to the two ALBs and set the 'Evaluate Target Health' value to 'Yes'.