How God orchestrates his providential interventions into the lives of his children is an argument for his omnitemporality (not that it makes it any more understandable – it is still only describable and still a wonderful mystery).
If you reflect on all the necessary precursor events and multiple people involved1 and the decisions they have made (even speeding up a bit or slowing down sooner at a yellow light, for instance, or leaving the house a second later in the morning), I think it’s obvious that no one’s free will was violated. My favorite examples of course that do not involve me personally are Rich Stearns and Maggie Eriksson. Imagine all the individuals involved and the timing and placing of each of the myriad of precursor events leading up to the significant ‘final’ one to have it fall out exactly as it did. And these are whole sets of incidents, not just one-offs.
1 (They have to have been born, too, and their particular lives led to put them when and where they were to influence the particular outcome of God’s providence. ; - )